Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1993C 1500 TRUCK 2WD V6-262 4.3L VIN ZREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )
1993 GMC C 1500 Truck 2WD V6-262 4.3L VIN Z
A L L Diagnostic Trouble Codes ( DTC )
1993 GMC C 1500 Truck 2WD V6-262 4.3L VIN ZSECTION A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection- Diagnostic Trouble Code Descriptions
- Manufacturer Code Charts
- DTC 01
- DTC 02
- DTC 03
- DTC 04
- DTC 05
- DTC 06
- DTC 07
- DTC 08
- DTC 09
- DTC 10
- DTC 11
- DTC 12
- DTC 13
- DTC 14
- DTC 15
- DTC 16
- DTC 21
- DTC 22
- DTC 23
- DTC 24
- DTC 25
- DTC 26
- DTC 27
- DTC 28
- DTC 29
- DTC 32
- DTC 33
- DTC 34
- DTC 35
- DTC 36
- DTC 37
- DTC 38
- DTC 41
- DTC 42
- DTC 43
- DTC 44
- DTC 45
- DTC 46
- DTC 47
- DTC 48
- DTC 49
- DTC 50
- DTC 51
- DTC 52
- DTC 53
- DTC 54
- DTC 55
- DTC 58
- DTC 59
- DTC 61
- DTC 62
- DTC 63
- DTC 65
- DTC 66
- DTC 67
- DTC 68
- DTC 69
- DTC 71
- DTC 72
- DTC 73
- DTC 74
- DTC 75
- DTC 79
- DTC 81
- DTC 82
- DTC 86
- DTC 88
- Related Tests, Information and Procedures
- Chart A-1 No Service Engine Soon Light
- Chart A-2 No ALDL Data or Won't Flash Code 12
- Chart A-2 Won't Flash DTC 12 No Serial Data MIL On Steady
- Chart A-3 Engine Cranks But Will Not Run
- Chart A-4 Injector Circuit Diagnosis
- Chart A-5 Fuel Pump and Relay Electrical Test
- Chart A-5 Fuel Pump Relay Circuit Diagnosis
- Chart A-6 Fuel System Diagnosis
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.