I've been seeing some guys talking bout setting the gap of the plugs in a vortec down to 0.40 instead of 0.60, mine are at 0.60 and it runs good but if dropping it down to 0.40 will help it out I will do it but I aint found a straight answer on it really so lets get some feedback on this cause...

the bulbs are ok, fuses are ok,(which both sides run off separate fuses). And when I put the high beams on, the symbol shows they are on but not working. So what can I look at next? Is there a relay I'm missing, or possibly need to replace the switch? Any help is appreciated. Thanks!!

As the title says: some might have an ses p0446, evap emissions vent circuit low. If you take it to the dealer they want 300-400.00 to fix the problem. GM has a service bulletin on this condition and have the updated part for 180.00, thats suppose to eliminate this issue. Basically the problem...

i am going to install a new set of plugs on my 98 silverado. i dont have a manual. i am looking for the proper spark plug gap for a vortec 5.7L?

I did browse the first thread on here but my 05 Suburban has never thrown a code. bought it with 91k and it now has about 165k http://www.gmtruckclub.com/forum/threads/how-to-fix-code-p0449-evap-pics-video-and-part-s.110446/ Issue is as stated. Can fill about a half gallon at a time unless i...