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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2025SILVERADO 3500 HD HIGH COUNTRY, 6.6L ENG VIN 7LABOR TIMESTRANSMISSIONAUTOMATIC TRANSTRANSMISSION ASSEMBLYREMOVAL & INSTALLATION
2025 Chevrolet Silverado 3500 HD High Country, 6.6L Eng VIN 7
Removal & Installation
2025 Chevrolet Silverado 3500 HD High Country, 6.6L Eng VIN 7SECTION Removal & Installation
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| Gas,4WD | Includes: R&I Front Propeller Shaft. Includes: R&I Rear Propeller Shaft. Includes: R&I Transmission Support. Includes: R&I Transmission Mount. Includes: R&I Transfer Case Assembly. Includes: R&I Fender Liners. Includes: R&I Starter Assembly. Includes: R&I Catalytic Converter. Includes: Check and adjust Transmission Fluid level with fluid temperature within parameters. | 11.1 | C | |
| Additional Procedure: TRANSMISSION ASSEMBLY: Removal & Installation: | ||||
| Where Skid Plate interferes add | 0.2 | C | ||
| Combination Procedure: CONVERTER: Drain & Test: | ||||
| 0.2 | C | |||
| Combination Procedure: CRANKSHAFT MAIN OIL SEAL: Remove & Replace: | ||||
| Rear | 0.5 | B | ||
| Combination Procedure: FLYWHEEL: Remove & Replace: | ||||
| 0.3 | C | |||
| Combination Procedure: TORQUE CONVERTER: Remove & Replace: | ||||
| 0.1 | C | |||
| Combination Procedure: TORQUE CONVERTER SEAL: Remove & Replace: | ||||
| 0.2 | B | |||
| Combination Procedure: TRANSFER CASE ASSEMBLY: Overhaul: | ||||
| 4WD | 4.3 | A | ||
| Combination Procedure: TRANSFER CASE ASSEMBLY: Replace: | ||||
| 4WD | Includes: Perform Relearn procedure. | 0.5 | C | |
| Combination Procedure: TRANSMISSION ASSEMBLY: Replace: | ||||
| Includes: Transmission Programming and Calibration of Learned Parameters. | 0.8 | C | ||
| Combination Procedure: TRANSMISSION CASE COVER O-RING: Remove & Replace: | ||||
| Front,O-Ring Seal | 0.5 | C | ||
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.