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Ask Your Question1999 GMC Suburban 1500
Question: my suburban light comes on and the code reads its po442
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Answer #1
globalhelper February 02, 2012, 12:49Reply
MasterTHAT CODES IS AN EVAP SMALL LEAK CK YOUR GAS CAP O RING AND SEE IF ITS CRACKED. IF NOT HAVE IT CK'D BY YOUR MECH WITH A SMOKE MACHINE
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Answer #2
dale45 from Fairway Auto Repair, February 02, 2012, 13:07Reply
JourneymanAlso,if the gas cap is not secured tightly, it can cause that code. So, when you check the cap, note how much force it takes to remove it. It could be that it is just loose.
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