2004 Chevy Impala Heater works when car hits a bump

2004 CHEVROLET IMPALA
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LEVERT
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Heater problem
2004 Chevy Impala

My heater works only after a long (35-55 min) warm up or after the car is jarred i.e.: hard door slam, hit a big bump, etc.

I think it the wiring but do not know anything about cars. Also the car's speedometer and radio seem to have shorts.
Oct 27, 2008 at 1:13 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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