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#1
03-21-2005, 09:17 PM
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99 silverado 1500 bank 1 rich
i have purchased a 99 1500 with a 4.8l
the day i bought it the check engine light came on it idles real rough like from 500-1100 rpm until it heats up to normal operating temp i took it to autozone they said it was bank 1 rich well after 160 bucks in o2 sensors i took it to a dealer they were nice enough to check it for free and said intake gasket was bad is there any way i can re torque them to seal it up or just have them put a new one ..... any ideas i just want the damn light to go out thanks Last edited by knoxj; 03-21-2005 at 10:48 PM. 
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#2
03-22-2005, 01:07 AM
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Re: 99 trouble codes
replace the intake gasket and switch to green coolant.....dexcool is hell on seals and gaskets
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#3
03-22-2005, 04:52 AM
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Re: 99 trouble codes
the reason the dexcool is used is I belive the green collant reacts badly in the engines due to there beeing cast steel and alumnium used in the construction
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#4
03-22-2005, 09:42 PM
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Re: 99 trouble codes
dex cool is far worse on these motors than green coolant just keep it changed every 2 years
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