My transmission slips?

2003 GMC ENVOY
190,000 MILES • 4.2L • V6 • 2WD • AUTOMATIC
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RICH NEGRETE
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  • 1 POST
I just replaced my water pump and thermostat and as soon as I got it back my transmission slips?
Jun 24, 2022 at 1:29 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
When you replaced the water pump did you remove the radiator? If so, your transmission could be low on fluid but to be sure check out this instructional guide with the specific instructions below to help you on your car.

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

10. Fill the transmission to the proper level with DEXRON(R)III transmission fluid.
11. Check the Cold fluid level reading for initial fill only.
12. Inspect the oil pan gasket for leaks.
Jun 28, 2022 at 10:15 AM
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