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.
2021 Buick Envision Avenir, AWDFACTORY OEM SERVICE PROCEDURE
Transaxle Assembly: Remove, Install, and Overhaul
Includes: R&I Transaxle Assembly, inspect and replace necessary Transmission and Differential components and road test.
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| AWD | Includes: R&I Front Bumper Cover. Includes: R&I Subframe Assembly. Includes: R&I Transfer Case Assembly. Includes: R&I Battery and Tray. Includes: Programming. Includes: Confirm Fluid temperature for level check. DOES NOT include wheel alignment. | 27.7 | A | |
| Combination Procedure: CRANKSHAFT MAIN OIL SEAL: Remove & Replace: | ||||
| Rear,Oil Seal Housing | 1.0 | B | ||
| Combination Procedure: FLYWHEEL: Remove & Replace: | ||||
| 0.2 | C | |||
| Combination Procedure: TRANSFER CASE ASSEMBLY: Overhaul: | ||||
| AWD, Power Transfer Unit | 4.2 | A | ||
| Combination Procedure: TRANSMISSION OIL COOLER & LINES: Flush: Includes: Inspect for leaks and fluid flow test. | ||||
| 0.5 | C | |||
Factory Service Tools
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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.