Mechanics

BACKFIRE

GMC C2500

How do you fix backfire and overheating for 1987 GMC Suburban R2500
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Joel_chiu969
May 6, 2007.




Could be an ignition wires crossover-routed incorrectly/ air injection diverter valve/could also be a partial clogged catalytic converter.

Rasmataz
May 8, 2007.


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