Steady engine light came on. on 2006 Hummer H3

Diagnostics done at dealer is stating cylinder needs to be replaced. Error code P0300 miss firing injector on cylinder 5. Only have 32,000 miles on it.. Estimate cost $5,000

by in Los Banos, CA on November 09, 2012
4 answers 5 comments
ANSWER by on November 09, 2012
P0300 is a random missfire code. It usally does not mean a major repair but I do not know for sure with what little info here. I would get a second opinion at another shop. Best get recommendations from friends or neighbors of a reliable shop in your town.
COMMENT by on November 09, 2012
What's confusing is manual states a Check Engine flasing light is a misfire condition and a Light on steady is emmission control.... and suggest to check gas cap is properly sealed.. vehicle is at dealers now and can't do that. thanks for your help.
COMMENT by on November 09, 2012
Not to confuse you but if it is dectecting an active missfire it will flash...If the missfire goes away then the light will just remain on solid....I do not think the gas cap is a issue in this case. I did do some research and there has been issues with the VTC system on that engine. (Variable Cam Timing)
COMMENT by on November 09, 2012
Appreciate your help, will take your suggestion and get a second opinion.
COMMENT by on March 04, 2014
HAVE A COMPRESSION CHECK DONE ON YOUR CYCLINDER AND YOU WILL MOST LIKELY FIND THAT YOU HAVE A BAD HEAD
ANSWER by on November 09, 2012
these motors i believe have valve issues that are covered under a dealer asst program for 7 yrs 70k miles.call anothe dealer and see if you fall into that group. have you vin# in hand when you call they will need it
COMMENT by on November 09, 2012
Thanks for your help... will certainly ask current dealer and call another one as backup.
ANSWER by on November 09, 2012
You heard wrong...NO ONE is replacing a cylinder...and it will NOT cost five grand to replace a fuel injector.
ANSWER by on March 04, 2014
PROBLEMS WITH MOST EARLY H3 HUMMERS. GM NOT DOING A RECALL. IF THE LAST 6 NUMBERS OF YOUR VIN ARE LESS THA 287591 YOU HAVE A GOOD CHANCE OF HAVING A BAD HEAD INSTALLED AT THE FACTORY