GM OBD/OBD2 Codes

Accessing GM OBD1 Trouble Codes

  • Turn ignition switch to OFF position
  • Locate Data Link Connector (DLC), see image below.
  • Jumper the A&B terminals(a paper clip or a jumper wire work ok)
  • Turn Ignition switch to ON position.
  • Count the flashes on the “CHECK ENGINE” or “SERVICE ENGINE” light.
  • FLASH, pause, FLASH, FLASH = code 12
  • NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.
  • NOTE: Some 94 & 95 models that DO have the A & B terminals still require a scanner.
  • All vehicles after 96 are OBDII,and require a scanner to access them.
GM Data Link Connector

12 Pin DLC

A – Ground
F – TCC
B – Test Terminal
G – Fuel Pump
C – Air Injection
H – Brake Sense Speed Input
E – Serial Data
M – Serial Data

Clearing Trouble Codes

Diagnostic trouble codes may be cleared by disconnecting the battery ground cable for at least 20 seconds. Reconnect negative battery cable and recheck codes to confirm the repair.

GM Specific Codes

GM OBD1 Codes
13 O2 sensor or circuit
14 coolant sensor/high temp
15 coolant temp/low temp
16 system voltage high (3.8L) DIS circuit
17
  • crank signal circuit
  • ECM fault crank position sensor circuit (3.8L)
18
  • crank signal circuit
  • ECM fault injector circuit (vin P-5.7L)
19
  • fuel pump circuit(shorted)
  • crank position sensor(88-91)
20 fuel pump circuit (open)
21 TPS circuit
21/22 grounded WOT circuit
23
  • MAT circuit
  • IAC sensor (95 models)
24 vehicle speed sensor
22 TPS out of adjustment
25 MAT circuit
26
  • Quad driver circuit
  • Throttle switch shorted
27 throttle switch open
28 Transmission range pressure switch
31
  • park/neutral switch
  • cam sensor circuit
  • EGR circuit (88-90)
  • MAP sensor (shorted)
32
  • BARO sensor circuit(carb models)
  • EGR circuit(injected models)
  • MAP sensor(open)
33
  • MAP sensor(low vacuum)
  • MAF sensor
  • MAP sensor(voltage high)
34
  • MAP sensor(voltage low)
  • MAF sensor
35
  • IAC valve or circuit
  • idle speed control circuit(shorted)
36
  • MAF sensor
  • DIS system(quad 4)
  • transaxle shift control (3.8L)
37
  • MAT sensor temp high (3.8L)
  • brake switch(4L60-E trans)
38
  • brake input circuit
  • MAT sensor temp low(84-86)
39 TCC knock sensor shorted(4.3L)
40 power steering pressure switch
41 faulty ignition module cam sensor (3.8L)
42 EST circuit
43
  • ESC circuit
  • knock sensor signal
45 O2 sensor(exhaust rich)
46 vehicle anti-theft system
47 air condition clutch and cruise circuit
51 PROM,MEM CAL or ECM problem (3.1L)
52 CALPK or ECM problem (3.1L)
53
  • system overvoltage
  • EGR system (carb models)
  • alternator out of range
54
  • fuel pump circuit
  • EGR fault (3.8L)
55 O2 sensor or ECM
56 vacuum sensor Quad drvier B (3.8L)
58 Trans code-TTS temp high
59 Trans code-TTS temp low
61 O2 sensor signal faulty
63 MAP sensor voltage high
64
  • MAP sensor voltage low
  • RH side O2 sensor lean
65 RH side O2 sensor rich
66
  • 3-2 Control solenoid circuit fault(4L60-E)
  • A/C pressure sensor circuit out of range
67 TCC solenoid circuit (4L60-E)
68 O/D ratio error (4L80-E)
69
  • TCC stuck on (4L60-E &4L80-E)
  • A/C head pressure switch circuit
72 VSS circuit loss transmission output signal
73 trans pressure control solenoid
74 Trans input speed error (4L80-E)
75 system voltage low
79 Transmission fluid temp high
81 transmission 2-3 error
82 transmission 1-2 error
83 TCC solenoid circuit fault
85 undefined gear ratio
86 low gear ratio error
87 high gear ratio error

For GM OBD2 Codes, please see our Full List of GM OBD2 Codes or specific model pages below

GM OBD/OBD2 Codes By Year

Select Your Vehicle Below
Year
Eng
 8th digit of the VIN Number
Model
82-83
2.5L
 All
82-83
3.0L
 All
86
1.8L
 Multi Port Fuel Injection, VIN J
86
1.8L
 Throttle Body Injection, VIN 0
86
2.0L
 Throttle Body Injection, VIN P
86
2.5L
 Throttle Body Injection, VIN 2
86
2.8L
 Carb, VIN X
86
3.8L
 Fuel Injection, VIN B
86-87
3.8L
 Carb, VIN A
86-87
4.1L
 4.1L Fuel Injection, VIN 8
86-87
5.0L
 5.0L Carburetor, VIN 9
86-88
2.5L
 Throttle Body Injection, VIN U
86-88
2.5L
 Throttle Body Injection, VIN R
86-88
2.8L
 Multi Port Fuel Injection, VIN 9
86-88
3.0L
 Multi Port Fuel Injection, VIN L
86-88
3.8L
 Fuel Injection, VIN 7
86-88
3.8L
 Fuel Injection, VIN 3
86-88
5.0L
 Carburetor, VIN H
86-88
5.0L
 Carburetor, VIN G
86-88
5.7L
 Fuel Injection, VIN 8
86-88
5.7L
 Carburetor, VIN 6
86-89
2.8L
 Multi Port Fuel Injection, VIN W
86-89
2.8L
 Multi Port Fuel Injection, VIN S
86-89
5.0L
 Fuel Injection, VIN F
86-90
4.3L
 Throttle Body Injection, VIN Z
87-88
2.0L
 Throttle Body Injection, VIN 1
87
2.8L
 Throttle BodyInjection VIN R
87-88
4.1L
 Multi Port Fuel Injection, VIN 7
87-90
2.0L
 Multi Port Fuel Injection, VIN M
87-90
5.0L
 Carb, VIN Y
87-91
2.0L
 Throttle Body Injection, VIN K
88-89
2.3L
 Multi Port Fuel Injection, VIN D
88-89
3.1L
 Multi Port Fuel Injection, VIN T
88-89
4.5L
 VIN 5
88-90
3.8L
 VIN C
88-93
5.0L
 Throttle Body Injection, VIN E CADILLAC Brougham
89
2.0L
 Throttle Body Injection, VIN 1
89
2.3L
 Multi Port Fuel Injection, VIN A
89
3.1L
 Multi Port Fuel Injection, VIN V
89
5.7L
 VIN 8
89-90
5.7L
 Throttle Body Injection, VIN 7
89-95
5.7L
 VIN K
89-91
2.5L
 Throttle Body Injection, VIN R
89-91
3.3L
 Multi Port Fuel Injection, VIN N
90
2.3L
 Multi Port Fuel Injection, VIN D
90
2.3L
 Multi Port Fuel Injection, VIN A
90
3.8L
 VIN L
90
4.5L
 VIN 3
90
5.7L
 VIN J
90-91
2.2L
 Throttle Body Injection, VIN G
90-91
3.1L
 Multi Port Fuel Injection, VIN V
90-91
5.0L
 VIN F
90-91
5.7L
 VIN 8
91
2.3L
 Multi Port Fuel Injection, VIN D
91
2.3L
 Multi Port Fuel Injection, VIN A
91
3.8L
 VIN C
91
3.8L
 VIN L
91
4.9L
 VIN B
91
5.7L
 Throttle Body Injection, VIN 7 CADILLAC Fleetwood
91
5.7L
 VIN J
91-92
1.9L
 Throttle Body Injection, VIN 9
91-92
1.9L
 Single Port Fuel Injection, VIN 7
91-92
3.4L
 Multi Port Fuel Injection, VIN X
91-92
4.5L
 VIN 8 CADILLAC Allante
92
2.0L
 Multi Port Fuel Injection, VIN H
92
2.2L
 VIN 4
92
2.3L
 Multi Port Fuel Injection, VIN D
92
2.3L
 Multi Port Fuel Injection, VIN A
92
2.3L
 Multi Port Fuel Injection, VIN 3
92
2.5L
 Throttle Body Injection, VIN R
BUICK Century, CHEVROLET Lumina, OLDSMOBILE Cutlass Ciera/Cruiser
92
3.1L
 VIN T CHEVROLET Camaro
92
3.1L
 VIN T PONTIAC Firebird
92
3.8L
 VIN L OLDSMOBILE Toronado, OLDSMOBILE Trofeo
92
4.3L
 VIN Z CHEVROLET Caprice Wagon
92
4.3L
 VIN Z OLDSMOBILE Bravada
92
5.0L
 VIN E CHEVROLET Caprice
92
5.0L
 VIN F
92
5.0L
 VIN E/F CHEVROLET Camaro
92
5.0L
 VIN E/F PONTIAC Firebird
92
5.7L
 Throttle Body Injection, VIN 7 CADILLAC Broughman
92
5.7L
 VIN 7 CHEVROLET Caprice
92
5.7L
 VIN 8 CHEVROLET Camaro
92
5.7L
 VIN J
92
5.7L
 VIN 8
92
5.7L
 VIN 8 PONTIAC Firebird
92-93
1.6L
 VIN 6 PONTIAC LeMans
92-93
2.5L
 VIN A GMC Sonoma
92-93
2.8L
 VIN R GMC Sonoma
92-93
3.1L
 VIN T/M PONTIAC Grand Prix
92-93
3.1L
 VIN T OLDSMOBILE Cutlass Supreme
92-93
3.3L
 Multi Port Fuel Injection, VIN N OLDSMOBILE Achieva
92-93
3.3L
 VIN N BUICK Skylark
92-93
3.3L
 VIN N PONTIAC Grand AM
93
3.3L
 VIN N OLDSMOBILE Cutlass Ciera/Cruiser
92-93
3.4L
 VIN X CHEVROLET Lumina
92-93
3.4L
 VIN X OLDSMOBILE Cutlass Supreme
92-93
3.4L
 VIN X PONTIAC Grand Prix
92-93
3.8L
 general & Supercharged
92-93
3.8L
 VIN L BUICK LeSabre
92-93
3.8L
 VIN L BUICK LeSabre
92-93
3.8L
 VIN L OLDSMOBILE Eighty Eight
92-93
3.8L
 VIN L OLDSMOBILE Ninety Eight
92-93
3.8L
 VIN L OLDSMOBILE Regency
92-93
3.8L
 VIN L OLDSMOBILE Silhouette
92-93
3.8L
 VIN L PONTIAC Bonneville, PONTIAC Trans Sport
92-93
3.8L
 VIN L CHEVROLET Lumina APV
92-93
4.3L
 Throttle Body Injection, VIN Z
92-93
4.9L
 VIN B CADILLAC DeVille, CADILLAC Eldorado, CADILLAC Fleetwood, CADILLAC Seville
92-93
5.7L
 VIN 7 BUICK Roadmaster
92-93
5.7L
 VIN P
92-93
6.2L
 VIN C GMC Rally, Sierra C/K Pickup, Vandura
92-94
1.9L
 VIN 7/9 Saturn S-Series
92-94
2.0L
 VIN H PONTIAC Sunbird
92-94
2.3L
 VIN A CHEVROLET Beretta
92-94
3.1L
 VIN T CHEVROLET Cavalier, CHEVROLET Lumina
92-94
3.1L
 VIN T PONTIAC Sunbird
92-94
3.8L
 VIN L BUICK Riviera
92-94
5.7L
 VIN K CHEVROLET Blazer
92-95
2.2L
 VIN 4 CHEVROLET Beretta/Corsica, CHEVROLET Cavalier
92-95
2.3L
 VIN D PONTIAC Sunfire
92-95
3.1L
 VIN T/M BUICK Regal, CHEVROLET Beretta/Corsica
92-95
3.1L
 VIN D CHEVROLET Lumina APV, PONTIAC Trans Sport
92-95
3.1L
 VIN D OLDSMOBILE Silhouette
92-95
3.8L
 VIN L
92-95
4.3L
 VIN Z CHEVROLET C/K Pickup
92-95
4.3L
 VIN Z GMC Vandura
92-95
4.3L
 VIN W/Z GMC Sonoma (Without vehicle control module (VCM))
92-95
4.3L
 VIN Z GMC Sierra C/K Pickup
92-95
4.3L
 VIN W/Z GMC Jimmy (Without vehicle control module (VCM))
92-95
4.3L
 VIN W/Z GMC Safari
92-95
4.3L
 VIN Z GMC Rally
92-95
5.0L
 VIN H CHEVROLET C/K Pickup
92-95
5.0L
 VIN H GMC Vandura
92-95
5.0L
 VIN H GMC Rally
92-95
5.0L
 VIN H GMC Sierra C/K Pickup
92-95
5.7L
 VIN K CHEVROLET C/K Pickup
92-95
5.7L
 VIN K GMC Vandura
92-95
5.7L
 VIN K GMC Yukon
92-95
5.7L
 VIN K GMC Suburban
92-95
5.7L
 VIN K GMC Rally
92-95
5.7L
 VIN K GMC Sierra C/K Pickup
92-95
7.4L
 VIN N CHEVROLET C/K Pickup
92-95
7.4L
 VIN N GMC Vandura
92-95
7.4L
 VIN N GMC Suburban
92-95
7.4L
 VIN J GMC Sierra C/K Pickup
92-95
7.4L
 VIN N GMC Rally
93
2.0L
 Multi Port Fuel Injection, VIN H
93
2.2L
 VIN 4
93
2.2L
 VIN 4 OLDSMOBILE Cutlass Ciera/Cruiser
93
2.3L
 Multi Port Fuel Injection, VIN D
93
2.3L
 Multi Port Fuel Injection, VIN A
93
2.3L
 Multi Port Fuel Injection, VIN 3
93
2.5L
 VIN A
93
3.1L
 Fuel Injection, VIN T
93
3.8L
 VIN L/1 BUICK Park Avenue
93
4.6L
 VIN 9 CADILLAC Allante
93
5.7L
 Throttle Body Injection, VIN 7 CADILLAC Fleetwood
93
5.7L
 VIN J
93-94
1.9L
 Throttle Body Injection, VIN 9
93-94
5.7L
 VIN P CHEVROLET Camaro
93-95
1.9L
 VIN 7
93-95
2.2L
 VIN 4 BUICK Century
93-95
3.1L
 VIN M OLDSMOBILE Cutlass Supreme
93-95
3.4L
 VIN X
93-95
3.4L
 VIN S CHEVROLET Firebird
93-95
3.4L
 VIN S CHEVROLET Camaro
93-95
4.3L
 VIN W
93-95
4.3L
 VIN W CHEVROLET Caprice Wagon
93-95
4.3L
 VIN Z CHEVROLET Chevy Van
93-95
4.3L
 VIN W OLDSMOBILE Bravada
93-95
4.6L
 VIN Y CADILLAC Eldorado, CADILLAC Seville, CADILLAC DeVille (1994-1995)
93-95
4.6L
 VIN 9 CADILLAC Eldorado, CADILLAC Seville
93-95
5.0L
 VIN H CHEVROLET Chevy Van
93-95
5.7L
 VIN K CHEVROLET Chevy Van
93-95
5.7L
 VIN P CHEVROLET Caprice
93-95
5.7L
 VIN P PONTIAC Firebird
93-95
7.4L
 VIN N CHEVROLET Chevy Van
94
2.0L
 Multi Port Fuel Injection, VIN H
94
2.2L
 VIN 4
94
2.3L
 Multi Port Fuel Injection, VIN D
94
2.3L
 Multi Port Fuel Injection, VIN A
94
2.3L
 Multi Port Fuel Injection, VIN 3
94
3.1L
 Multi Port Fuel Injection, VIN T
94
5.7L
 VIN P BUICK Roadmaster
94
5.7L
 VIN P CHEVROLET Corvette (OBD-I)
94-95
2.2L
 VIN 4 GMC Sonoma
94-95
2.2L
 VIN 4 OLDSMOBILE Cutlass Ciera/Cruiser
94-95
3.1L
 VIN M OLDSMOBILE Achieva
94-95
3.1L
 VIN M BUICK Skylark, PONTIAC Grand AM
94-95
3.1L
 VIN T/M PONTIAC Grand Prix
94-95
3.4L
 VIN X PONTIAC Grand Prix
94-95
3.8L
 VIN L CHEVROLET Lumina APV/Minivan
94-95
3.8L
 VIN L PONTIAC Trans Sport
94-95
3.8L
 VIN L OLDSMOBILE Silhouette
94-95
4.3L
 VIN Z
94-95
4.9L
 VIN B
94-95
4.9L
 VIN B CADILLAC DeVille
94-95
5.7L
 VIN J
94-95
5.7L
 VIN P CHEVROLET Corvette (OBD-II)
94-95
5.7L
 VIN P CADILLAC Fleeetwood
94-95
6.5L
 6.5 Diesel
94-95
6.5L
 VIN P/Y GMC Rally
94-95
6.5L
 VIN F/P/S GMC Sierra C/K Pickup
94-95
6.5L
 VIN F GMC Suburban
94-95
6.5L
 VIN P GMC Vandura
94-95
6.5L
 VIN S GMC Yukon
94-96
3.1L
 VIN M OLDSMOBILE Cutlass Ciera/Cruiser
94-96
3.4L
 VIN X CHEVROLET Lumina
94-96
3.8L
 VIN 1/L OLDSMOBILE Ninety Eight, Regency
94-97
3.4L
 VIN X OLDSMOBILE Cutlass Supreme
94-97
3.8L
 VIN 1/K/L OLDSMOBILE Eighty Eight
94-02
3.1L
 VIN M BUICK Century
94-02
3.8L
 VIN L/K/1 BUICK LeSabre, BUICK Park Avenue
94-02
3.8L
 VIN L/K/1 BUICK Regal
94-02
3.8L
 VIN L/K/1 PONTIAC Bonneville
95
1.9L
 VIN 7/8 Saturn S-Series
95
1.9L
 Throttle Body Injection, VIN 8
95
2.2L
 VIN 4
95
2.2L
 VIN 4 PONTIAC Sunfire (OBD-I)
95
2.3L
 Multi Port Fuel Injection, VIN D
95
2.3L
 Multi Port Fuel Injection, VIN D
95
2.3L
 VIN D/T CHEVROLET Cavalier
95
2.3L
 VIN D PONTIAC Sunfire
95
3.8L
 VIN 1/K OLDSMOBILE Aurora
95
4.0L
 VIN C OLDSMOBILE Aurora
95
4.3L
 VIN W/Z GMC Jimmy (With vehicle control module (VCM))
95
4.3L
 VIN W/Z GMC Sonoma (With vehicle control module (VCM))
95
5.7L
 VIN P BUICK Roadmaster
95
5.7L
 VIN W CHEVROLET Tahoe
95-97
3.4L
 VIN K/1 CHEVROLET Monte Carlo
95-99
3.8L
 VIN K/1 BUICK Riviera
95-02
2.2L
 VIN 4/5/F PONTIAC Sunfire
95-02
3.8L
 VIN K CHEVROLET Camaro, PONTIAC Firebird
95-02
5.7L
 VIN G CHEVROLET Camaro
96
2.2L
 VIN 4 BUICK Century
96
2.2L
 VIN 4 CHEVROLET Beretta/Corsica
96
2.2L
 VIN 4 OLDSMOBILE Cutlass Ciera
96
3.1L
 VIN M CHEVROLET Beretta/Corsica
96
3.4L
 VIN E CHEVROLET Lumina APV/Minivan
96
3.4L
 VIN X PONTIAC Grand Prix
96
4.3L
 VIN Z GMC Vandura
96
5.7L
 VIN K GMC Rally
96
5.7L
 VIN K GMC Vandura
96
5.7L
 VIN P BUICK Roadmaster
96
5.7L
 VIN P CHEVROLET Caprice
96
5.7L
 VIN 5 OBDII
96
6.5L
 6.5L Diesel
96
6.5L
 VIN Y GMC Rally
96
6.5L
 VIN Y GMC Vandura
96
7.4L
 VIN N GMC Vandura
96
7.4L
 VIN S GMC Envoy
96-97
3.1L
 VIN M BUICK Regal
96-97
3.1L
 VIN M OLDSMOBILE Achieva, Cutlass Supreme
96-97
3.4L
 VIN E OLDSMOBILE Silhouette
96-98
2.4L
 VIN T BUICK Skylark
96-98
2.4L
 VIN T OLDSMOBILE Achieva
96-98
3.1L
 VIN M BUICK Skylark
96-98
3.1L
 VIN M PONTIAC Grand AM
96-98
3.4L
 VIN E PONTIAC Trans Sport
96-99
3.1L
 VIN M CHEVROLET Monte Carlo
96-99
5.0L
 VIN M CHEVROLET Suburban
96-99
5.0L
 VIN M GMC Sierra C/K Pickup
96-99
5.7L
 VIN R CHEVROLET Suburban
96-99
5.7L
 VIN R GMC Suburban
96-99
6.5L
 VIN F GMC Suburban
96-99
6.5L
 VIN S GMC Yukon
96-99
7.4L
 VIN J CHEVROLET Suburban
96-99
7.4L
 VIN J GMC Suburban
96-00
4.3L
 VIN W CHEVROLET C/K Pickup
96-00
5.0L
 VIN M CHEVROLET C/K Pickup
96-00
5.7L
 VIN R CHEVROLET C/K Pickup
96-00
5.7L
 VIN R CHEVROLET Tahoe
96-00
5.7L
 VIN R GMC Yukon
96-00
5.7L
 VIN R GMC Sierra C/K Pickup
96-00
6.5L
 VIN F/S GMC Sierra C/K Pickup
96-00
7.4L
 VIN J CHEVROLET C/K Pickup
96-00
7.4L
 VIN J CHEVROLET Chevy Van/Express
96-00
7.4L
 VIN J GMC Savana
96-00
7.4L
 VIN J GMC Sierra C/K Pickup
96-00
7.4L
 VIN J CHEVROLET Chevy Van/Express
96-01
2.4L
 VIN T PONTIAC Grand AM
96-01
3.1L
 VIN T/M/J CHEVROLET Lumina
96-02
1.9L
 VIN 7/8 SATURN S-Series
96-02
2.2L
 VIN 4/5 CHEVROLET S10 Pickup
96-02
2.2L
 VIN 4 CHEVROLET Cavalier
96-02
2.2L
 VIN 4 GMC Sonoma
96-02
2.4L
 VIN T CHEVROLET Cavalier
96-02
2.4L
 VIN T PONTIAC Sunfire
96-02
3.1L
 VIN M PONTIAC Grand Prix
96-02
4.0L
 VIN C OLDSMOBILE Aurora
96-02
4.3L
 VIN W CHEVROLET Chevy Van/Express
96-02
4.3L
 VIN W/X GMC Sonoma
96-02
4.3L
 VIN W OLDSMOBILE Bravada
96-02
4.3L
 VIN W GMC Jimmy, Safari, Savana, Sierra C/K Pickup
96-02
4.3L
 VIN W/X CHEVROLET S10 Pickup
96-02
4.6L
 VIN Y/9 CADILLAC DeVille
96-02
4.6L
 VIN Y/9 CADILLAC Eldorado
96-02
4.6L
 VIN Y/9 CADILLAC Seville
96-02
5.0L
 VIN M CHEVROLET Chevy Van/Express
96-02
5.0L
 VIN M GMC Savana
96-02
5.7L
 VIN G/S CHEVROLET Corvette
96-02
5.7L
 VIN G/P PONTIAC Firebird
96-02
5.7L
 VIN R CHEVROLET Chevy Van/Express
96-02
5.7L
 VIN R GMC Savana
96-02
6.5L
 VIN F/S GMC Savana
97
6.5L
 6.5L Diesel
97-99
3.1L
 VIN M OLDSMOBILE Cutlass
97-01
3.0L
 VIN R CADILLAC Catera
97-02
3.8L
 VIN K/1 PONTIAC Grand Prix
98
3.1L
 VIN M OLDSMOBILE Achieva
98-99
3.8L
 VIN 1/K OLDSMOBILE Eighty Eight
98-00
3.8L
 VIN K OLDSMOBILE Intrigue
98-01
1.0L
 VIN 6 CHEVROLET Metro
98-01
1.3L
 VIN 2 CHEVROLET Metro
98-02
1.6L
 VIN R CHEVROLET Tracker
98-02
3.4L
 VIN E OLDSMOBILE Silhouette
98-02
3.8L
 VIN K CHEVROLET Monte Carlo
99-00
2.4L
 VIN T OLDSMOBILE Alero
99-00
3.5L
 VIN H OLDSMOBILE Intrigue
99-00
5.7L
 VIN R CADILLAC Escalade
99-01
4.3L
 VIN W GMC Envoy
99-02
2.0L
 VIN C CHEVROLET Tracker
99-02
3.4L
 VIN E PONTIAC Grand AM
99-02
3.4L
 VIN M OLDSMOBILE Alero
99-02
3.4L
 VIN E PONTIAC Trans Sport
99-02
4.3L
 VIN W CHEVROLET Silverado
99-02
4.8L
 VIN V CHEVROLET Silverado
99-02
4.8L
 VIN V GMC Sierra C/K Pickup
99-02
5.3L
 VIN T CHEVROLET Silverado
99-02
5.3L
 VIN T GMC Sierra C/K Pickup
99-02
6.0L
 VIN U CHEVROLET Silverado
99-02
6.0L
 VIN U GMC Sierra C/K Pickup
99-02
8.1L
 VIN G CHEVROLET Silverado
00
4.8L
 VIN V GMC Yukon
00-02
2.2L
 VIN F SATURN L-Series
00-02
3.0L
 VIN R SATURN L-Series
00-02
4.8L
 VIN V CHEVROLET Tahoe
00-02
4.8L
 VIN V CHEVROLET Suburban
00-02
5.3L
 VIN T CHEVROLET Tahoe
00-02
5.3L
 VIN T CHEVROLET Suburban, GMC Suburban
00-02
6.0L
 VIN U CHEVROLET Suburban
00-02
6.0L
 VIN U GMC Yukon
00-02
6.0L
 VIN U GMC Suburban
00-02
8.1L
 VIN G CHEVROLET Suburban
01-02
2.5L
 VIN 1 CHEVROLET Tracker
01-02
2.5L
 VIN 1 CHEVROLET Tracker
01-02
3.4L
 VIN E PONTIAC Aztek
01-02
3.5L
 VIN H OLDSMOBILE Aurora
01-02
5.3L
 VIN T GMC Yukon
01-02
6.0L
 VIN U CADILLAC Escalade
01-02
6.6L
 VIN 1 GMC Sierra C/K Pickup
01-02
8.1L
 VIN G CHEVROLET Chevy Van/Express
01-02
8.1L
 VIN G GMC Suburban
01-02
8.1L
 VIN G GMC Savana
01-02
8.1L
 VIN G GMC Sierra C/K Pickup
01-02
8.1L
 VIN G GMC Yukon
02
2.2L
 VIN F CHEVROLET Cavalier
02
2.2L
 VIN T PONTIAC Grand AM
02
2.2L (L61)
 VIN T OLDSMOBILE Alero
02
4.2L
 VIN S GMC Envoy

GM OBD/OBD2 Codes By Model

Model Year Engine identification System
Acadia 3.6L 2008-09 VIN position 8 =7N GM
Canyon 2.8/3.5L 2004-06 VIN position 8 =6/8 GM
Canyon 2.9/3.6/3.7/5.3L 2007-09 VIN position 8 =9/E/L GM
Envoy 4.2/5.3L 2002-09 VIN position 8 =S/M GM
Envoy 4.3/5.3L 1999-08 VIN position 8 =PIW GM
G-Series 4.3L 1992-95 VIN position 8 =Z GM
G-Series 5.0L 1992-95 VIN position 8 =H GM
G-Series 5.7L 1992-95 VIN position 8 =K GM
G-Series 5.7L 1996 VIN position 8 =K GM
G-Series 6.5L 1994-95 VIN position 8 =PlY GM
G-Series 6.5L 1996 VIN position 8 =Y GM
G-Series 7.4L 1992-95 VIN position 8 =N GM
G-Series 7.4L 1996 VIN position 8 =N GM
Jimmy 4.3L 1996-01 VIN position 8 =W GM
Jimmy 4.3L -with vehicle control module (VCM) 1995 VIN position 8 =W/Z GM
Jimmy 4.3L -without vehicle control module (VCM) 1992-95 VIN position 8 =W/Z GM
Savana 4.3L 1996-0S VIN position 8 =X GM
Savana 4.8L 2003-09 VIN position 8 =V GM
Savana 5.0L 1996-02 VIN position 8 =M GM
Savana 5.3L 2003-09 VIN position 8 =T GM
Savana 5.7L 1996-02 VIN position 8 =R GM
Savana 6.0L 2003-09 VIN position 8 =U GM
Savana 6.5L 1996-02 VIN position 8 =F/S GM
Savana 6.6L 2006-09 VIN position 8 =21W GM
Savana 7.4L 1996-02 VIN position 8 =J GM
Savana 8.1L 2001-02 VIN position 8 =G GM
Sierra C/K Pickup 4.3L 1992-95 VIN position 8 =Z GM
Sierra C/K Pickup 5.0L 1992-95 VIN position 8 =H GM
Sierra C/K Pickup 5.7L 1992-95 VIN position 8 =K GM
Sierra C/K Pickup 5.7L 1996-00 VIN position 8 =R GM
Sierra C/K Pickup 6.5L 1994-95 VIN position 8 =F/P/S GM
Sierra C/K Pickup 6.5L Turbo Diesel 1996-00 VIN position 8 =F/S GM
Sierra C/K Pickup 6.6L Turbo Diesel 2001-09 VIN position 8 =1 GM
Sierra C/K Pickup 7.4L 1992-95 VIN position 8 =N GM
Sierra C/K Pickup 7.4L 1996-00 VIN position 8 =J GM
Sierra/Denali/C/K Pickup 4.3L 1996-09 VIN position 8 =W/X GM
Sierra/Denali/C/K Pickup 4.8L 1999-09 VIN position 8 =CN GM
Sierra/Denali/C/K Pickup 5.0L 1996-00 VIN position 8 =M GM
Sierra/Denali/C/K Pickup 5.3L 1999-09 VIN position 8 =3/BrTlY GM
Sierra/Denali/C/K Pickup 6.0L 1999-09 VIN position 8 =S/N/UIY GM
Sierra/Denali/C/K Pickup 6.2L 2008-09 VIN position 8 =8 GM
Sierra/Denali/C/K Pickup 8.1 L 2001-07 VIN position 8 =G GM
Sonoma 2.2L 1994-95 VIN position 8 =4 GM
Sonoma 2.2L 1996-03 VIN position 8 =4 GM
Sonoma 2.5L 1992-93 VIN position 8 =A GM
Sonoma 2.8L 1992-93 VIN position 8 =R GM
Sonoma 4.3L -without vehicle control module (VCM) 1992-95 VIN position 8 =W/Z GM
Sonoma 4.3L -with vehicle control module (VCM) 1995 VIN position 8 =W/Z GM
Sonoma 4.3L 1996-04 VIN position 8 =W/X GM
Suburban 5.7L 1992-95 VIN position 8 =K GM
Suburban 5.7L 1996-99 VIN position 8 =R GM
Suburban 6.5L 1994-95 VIN position 8 =F GM
Suburban 6.5L Diesel 1996-99 VIN position 8 =F GM
Suburban 7.4L 1992-95 VIN position 8 =N GM
Suburban 7.4L 1996-99 VIN position 8 =J GM
Yukon 4.8L 2000-09 VIN position 8 =CN GM
Yukon 5.7L 1992-95 VIN position 8 =K GM
Yukon 5.7L 1996-00 VIN position 8 =R GM
Yukon 6.5L 1994-95 VIN position 8 =S GM
Yukon 6.5L Turbo Diesel 1996-99 VIN position 8 =S GM
Yukon/Denali 5.3L 2001-09 VIN position 8 =O/3/CrT GM
Yukon/Denali 6.0/6.2L 2000-09 VIN position 8 =2/S/8/N/UIY GM
YukonlDenali 8.1 L 2001-07 VIN position 8 =G GM

3 Replies to “GM OBD/OBD2 Codes”

    1. These refer to the front airbag system impact sensors, somewhere under the front bumper cover. Probably not disconnected, because otherwise, you’d get a different DTC, but maybe a loose or corroded connection. Any recent bodywork or front impact?

      Reply

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