8.7

pretty bad
Typical Repair Cost:
$60
Average Mileage:
79,100 miles
Total Complaints:
3 complaints

Most common solutions:

  1. replace the idler pulley (2 reports)
  2. replace alternator (1 reports)
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problem #3

Sep 132014

Trailblazer Straight 6

  • Automatic transmission
  • 111,234 miles

as soon as that small whining began the alternator went out. that sucked

- tssbakertb, Rome, GA, US

problem #2

Dec 052012

Trailblazer LS 4.2L

  • Automatic transmission
  • 76,000 miles

I had to replace both pulleys once under warranty then again e few years later.Really I have had to replace so much on this suv wish i wouldn't have even purchased this piece of sh*t.........

- Tammy C., Dayton, OH, US

problem #1

Nov 012008

Trailblazer EXT 4.2L I6

  • Automatic transmission
  • 50,000 miles

I started to get this whining under the hood. At first I thought it was the power steering. I heard several other Trailblazer making the same sounds, so I thought that it might be normal. It started getting really load, and embarrassing. I found out that it is the alternator. A new one cost $200. I have nothing but problems developing with my rig, and with less than 60k miles, I am an extremely disappointing customer. It is getting really hard for me to continue to buy American vehicles, when I have to spend my salary to keep them on the road.

Update from Oct 10, 2010: This turned out to be the idler pulley. The tension pulley is now going out.

- Michael M., Meridian, ID, US