backfire

GMC C2500
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JOEL_CHIU969
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How do you fix backfire and overheating for 1987 GMC Suburban R2500
May 6, 2007 at 5:35 PM
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RASMATAZ
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[quote:14f704ca46="joel_chiu969"]How do you fix backfire and overheating for 1987 GMC Suburban R2500[/quote:14f704ca46]

Could be an ignition wires crossover-routed incorrectly/ air injection diverter valve/could also be a partial clogged catalytic converter.
May 8, 2007 at 5:35 PM