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pretty bad
Typical Repair Cost:
No data
Average Mileage:
90,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2001 GMC Sierra 1500 cooling system problems

cooling system problem

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2001 GMC Sierra 1500 Owner Comments

problem #1

Jun 152007

(reported on)

Sierra 1500 5.3L

  • Automatic transmission
  • 90,000 miles


I have a 2001 GMC Sierra 1500. Engine temp holds rock steady in normal range (200 - 210) until outside temp goes higher than 85 degrees F. With A/C running, the temp slowly moves up to the "danger" zone. Have had the water pump and water temp sensor replaced. This made no difference. Took to dealer while the gauge was registering "over heated". The technician took a reading with a laser temp gun of the engine and the result was a normal engine temperature. So.... it appears that I have some problem existing between the computer and the temp gauge. It is hard to ignore the temp gauge even though I know that I am seeing an inaccurate reading on the gauge. Any suggestions would be appreciated.

- , Snellville, GA, USA

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