why does my truck turn off when i turn on ac

Asked by Mar 07, 2015 at 09:47 AM about the 2005 Chevrolet TrailBlazer

Question type: Maintenance & Repair

2 Answers

98,385

Check the a/C compressor, it maybe froze, usually it make site belt really squeal but some of the lower torque rigs I have seen it just kil the engine at idle.

1 of 1 people found this helpful.
69,315

When you switch on the A/C an A/C request signal is sent to the computer. The computer then speeds up the idle about 50 RPMs to compensate for the added load of the A/C compressor. Sounds like the speed up device isn't working. HTH. -Jim

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