4.0

definitely annoying
Typical Repair Cost:
No data
Average Mileage:
83,885 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. replace coolant lines (1 reports)
2004 GMC Envoy AC / heater problems

AC / heater problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2004 GMC Envoy:

Unsubscribe any time. We don't sell/share your email.

2004 GMC Envoy Owner Comments

problem #1

Dec 012010

Envoy EXT 4.2L V6

  • Automatic transmission
  • 83,885 miles

A D V E R T I S E M E N T S

The engine coolant lines leading to the rear heating unit failed and anti-freeze dripped out. The solid aluminum lines cost over $1K for the part alone, then add labour on top. I opted for the cheap fix which was to crimp the lines off near the engine and for go rear heat ($300). My GMC dealer told me that the design was poor. Insufficient fluid movement contributed to sludge building up. I am not sure how that contributed to Al corrosion, but I accepted that they saw a higher number of these problems showing up. If I used a local mechanic, I may have been able to solder Al (specific skill) or replace a section with tubing and clamps. When I thought about the inconvenience of a leak in the middle of nowhere vs no rear heat and getting it fixed that day, I went for the by-pass solution. No leaks, but no rear heat (other than recirculating the front heat through the rear blower which still works.)

- , Ottawa, Ontario, canada

Not what you are looking for?