New Service Bulletin - SS Montes/Impala/GXP
#41
Hmmm? My father has a 07 LTZ with a 3.9l and I can vouch for that grumbling sound from the exhaust at idle and slight miss, not to mention the constant tire pressure sensor light! Looks like I'll be heading to the dealer soon! Thanks for the info! Unfortunately/fortunately my SS does not have the same exhaust issue!