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.
1966 GMCFACTORY OEM SERVICE PROCEDURE
GMC: 1966
- 1000
- 4.1L Eng, Automatic Trans
- 4.1L Eng, Standard Trans, Trans Mfr CD 435GA
- 4.1L Eng, Standard Trans, Trans Mfr CD 435GL
- 4.1L Eng, Standard Trans, Trans Mfr CD SM326
- 4.1L Eng, Standard Trans, Trans Mfr CD SM420
- 4.1L Eng, Standard Trans, Trans Mfr CD T89
- 5.0L Eng, Automatic Trans
- 5.0L Eng, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Standard Trans, Trans Mfr CD T89
- 1500
- 2500
- 3000
- 3500
- G1000 Series
- 2.5L Eng, Automatic Trans
- 2.5L Eng, Not Available Trans
- 2.5L Eng, Standard Trans, Trans Mfr CD A745G
- 2.5L Eng, Standard Trans, Trans Mfr CD SM326
- 2.5L Eng, Standard Trans, Trans Mfr CD SM420
- 2.5L Eng, Standard Trans, Trans Mfr CD T89
- 3.2L Eng, Automatic Trans
- 3.2L Eng, Not Available Trans
- 3.2L Eng, Standard Trans, Trans Mfr CD A745G
- 3.2L Eng, Standard Trans, Trans Mfr CD SM326
- 3.2L Eng, Standard Trans, Trans Mfr CD SM420
- 3.2L Eng, Standard Trans, Trans Mfr CD T89
- 3.8L Eng VIN S, Automatic Trans
- 3.8L Eng VIN S, Not Available Trans
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD A745G
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM326
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM420
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD T89
- I1000
- I1500
- I2500
- I3500
- K1000
- 5.0L Eng, Eng CD 305, Automatic Trans
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD T89
- 5.0L Eng, Eng CD 305C, Automatic Trans
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD T89
- 5.0L Eng, Eng CD 305E, Automatic Trans
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351, Automatic Trans
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351C, Automatic Trans
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351E, Automatic Trans
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351M, Automatic Trans
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD T89
- K1000 Pickup
- K15/K1500 Pickup
- 5.0L Eng, Eng CD 305, Automatic Trans, Trans Mfr CD AT218
- 5.0L Eng, Eng CD 305, Automatic Trans, Trans Mfr CD Powerglide
- 5.0L Eng, Eng CD 305, Automatic Trans, Trans Mfr CD THM400
- 5.0L Eng, Eng CD 305, Not Available Trans
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305, Standard Trans, Trans Mfr CD T89
- 5.0L Eng, Eng CD 305C, Automatic Trans, Trans Mfr CD AT218
- 5.0L Eng, Eng CD 305C, Automatic Trans, Trans Mfr CD Powerglide
- 5.0L Eng, Eng CD 305C, Automatic Trans, Trans Mfr CD THM400
- 5.0L Eng, Eng CD 305C, Not Available Trans
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305C, Standard Trans, Trans Mfr CD T89
- 5.0L Eng, Eng CD 305E, Automatic Trans, Trans Mfr CD AT218
- 5.0L Eng, Eng CD 305E, Automatic Trans, Trans Mfr CD Powerglide
- 5.0L Eng, Eng CD 305E, Automatic Trans, Trans Mfr CD THM400
- 5.0L Eng, Eng CD 305E, Not Available Trans
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD A745G
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD SM420
- 5.0L Eng, Eng CD 305E, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351, Automatic Trans, Trans Mfr CD AT218
- 5.7L Eng, Eng CD 351, Automatic Trans, Trans Mfr CD Powerglide
- 5.7L Eng, Eng CD 351, Automatic Trans, Trans Mfr CD THM400
- 5.7L Eng, Eng CD 351, Not Available Trans
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351C, Automatic Trans, Trans Mfr CD AT218
- 5.7L Eng, Eng CD 351C, Automatic Trans, Trans Mfr CD Powerglide
- 5.7L Eng, Eng CD 351C, Automatic Trans, Trans Mfr CD THM400
- 5.7L Eng, Eng CD 351C, Not Available Trans
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351E, Automatic Trans, Trans Mfr CD AT218
- 5.7L Eng, Eng CD 351E, Automatic Trans, Trans Mfr CD Powerglide
- 5.7L Eng, Eng CD 351E, Automatic Trans, Trans Mfr CD THM400
- 5.7L Eng, Eng CD 351E, Not Available Trans
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD T89
- 5.7L Eng, Eng CD 351M, Automatic Trans, Trans Mfr CD AT218
- 5.7L Eng, Eng CD 351M, Automatic Trans, Trans Mfr CD Powerglide
- 5.7L Eng, Eng CD 351M, Automatic Trans, Trans Mfr CD THM400
- 5.7L Eng, Eng CD 351M, Not Available Trans
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD A745G
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD T89
- L3500
- 5.0L Eng, Automatic Trans
- 5.0L Eng, Standard Trans, Trans Mfr CD 435GA
- 5.0L Eng, Standard Trans, Trans Mfr CD 435GL
- 5.0L Eng, Standard Trans, Trans Mfr CD SM326
- 5.0L Eng, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351, Automatic Trans
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351C, Automatic Trans
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351C, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351E, Automatic Trans
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351E, Standard Trans, Trans Mfr CD SM420
- 5.7L Eng, Eng CD 351M, Automatic Trans
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GA
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD 435GL
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM326
- 5.7L Eng, Eng CD 351M, Standard Trans, Trans Mfr CD SM420
- LI3500
- P1000
- 2.5L Eng, Automatic Trans
- 2.5L Eng, Standard Trans, Trans Mfr CD SM326
- 2.5L Eng, Standard Trans, Trans Mfr CD SM420
- 2.5L Eng, Standard Trans, Trans Mfr CD T89
- 3.2L Eng, Automatic Trans
- 3.2L Eng, Standard Trans, Trans Mfr CD SM326
- 3.2L Eng, Standard Trans, Trans Mfr CD SM420
- 3.2L Eng, Standard Trans, Trans Mfr CD T89
- 3.8L Eng VIN S, Automatic Trans
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM326
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM420
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD T89
- PB1000 Series
- 2.5L Eng, Automatic Trans
- 2.5L Eng, Not Available Trans
- 2.5L Eng, Standard Trans, Trans Mfr CD SM326
- 2.5L Eng, Standard Trans, Trans Mfr CD SM420
- 3.2L Eng, Automatic Trans
- 3.2L Eng, Not Available Trans
- 3.2L Eng, Standard Trans, Trans Mfr CD SM326
- 3.2L Eng, Standard Trans, Trans Mfr CD SM420
- 3.8L Eng VIN S, Automatic Trans
- 3.8L Eng VIN S, Not Available Trans
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM326
- 3.8L Eng VIN S, Standard Trans, Trans Mfr CD SM420
- PB15 Series
- PB25 Series
- PB2500 Van
- PB3500 Van
- Suburban
Database: LEMON
LEMON manuals were retrieved in late 2025. For very old vehicles, they are not very detailed.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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