Quote:
Originally Posted by geaux_tigerss
Update on this. The problem seems likely to be related.
Got a CEL. Onstar said "variable valve timing problem" when they read the code. Car bucks and surges at all RPMs during acceleration and constant speed driving. Almost feels like a big cam with a bad tune. Dropped it off at the dealer this morning. Will post the resolution when I find out.
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CEL will tell them where to look. My bet is a bad sensor on camshaft timing.
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2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles...
2012 Yukon XL Denali w/ 6.2 AWD
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