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Singapore
1 Level
705 Review
66 Karma

Review on ACDelco 131 121 Original Equipment Thermostat by Patrick Biletnikoff

Revainrating 1 out of 5

Not the right part. for engine cooling and air conditioning

Will not fit 2003 Chevy 2500 commuter with 8.1 liter engine although Revain claims it will. Included are photos of the original smaller thermostat compared to the much larger new thermostat. The new thermostat also has brass rivets, the original doesn't. Looks like GM part number 131-131 but the part number 131-121 is clearly printed on the box.

Pros
  • Quality construction
Cons
  • Hard to tell