What are the most common GMC Envoy problems?
According to Au7o's analysis of 1,010+ owner reports, the 2002 GMC Envoy has 3 documented issues. The most frequently reported are: 4.2L I6 Crankshaft Position Sensor Failure and Stalling, Electric Cooling Fan Clutch Failure, Transfer Case Encoder Motor and Front Axle Actuator Failure. Of these, 2 are rated critical and should be addressed promptly.
Is the GMC Envoy reliable?
The 2002 GMC Envoy has 3 known issues documented across 1,010+ owner reports. 2 issues are rated critical: 4.2L I6 Crankshaft Position Sensor Failure and Stalling and Electric Cooling Fan Clutch Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common GMC Envoy problems?
Repair costs for known GMC Envoy issues range from $80 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 4.2L I6 Crankshaft Position Sensor Failure and Stalling, typically costs $80-$300 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2002-2009 GMC Envoy 4.2L I6 Crankshaft Position Sensor Failure and Stalling?
The 4.2L LL8 inline-6 engine in the 2002-2009 GMC Envoy is notorious for crankshaft position sensor failures that cause intermittent stalling and no-start conditions. The sensor is located on the side of the engine block and is exposed to heat soak from the exhaust manifold, acce… Repairs typically run $80-$300. Severity: high.
What is the 2002-2009 GMC Envoy Electric Cooling Fan Clutch Failure?
The electronically controlled fan clutch fails, causing overheating in traffic or at low speeds. The Envoy uses a clutch-type fan rather than electric fans, and the electronic control module in the clutch is the weak point. Repairs typically run $200-$500. Severity: high.
What is the 2002-2009 GMC Envoy Transfer Case Encoder Motor and Front Axle Actuator Failure?
The 2002-2009 Envoy uses the BorgWarner 4482 (Auto-Trak) transfer case with an electric encoder motor for 4WD engagement. The encoder motor and its associated hall-effect position sensor fail regularly between 80,000-120,000 miles, causing 4WD to not engage, 4WD warning lights, a… Repairs typically run $200-$1,500. Severity: medium.
