Question about 2002 Hummer H1

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My 2002 H1, bogs out going up hills. What is wrong?

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I never had a Hummer but I can tell you a couple of things to check. Make sure your fuel(every 30000 miles) and air filter are new. The other thing,my 2001 monte carlo needed a new catalitic converter at 44000 miles.It was acting like your Hummer. I had a high-flow type installed. Yours and mine are both GM,maybe they use the same type cat. Have someone push down on the gas petal while you feel the exhaust flow coming out of the tail pipe. The flow should increase as the gas petal goes down.
I hope this helps you.

Posted on Sep 11, 2009

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Posted on Jan 02, 2017

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one fact missing, and is key
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that is you move right foot fast and it bogs, we get that but what happens after the bog> ? more bog or it catches up.
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