TracerSS Posted October 2, 2003 Report Share Posted October 2, 2003 Does your SS ping and pop in the exhaust area fairly loud after parking it for a few minutes... at least it sounds like it coming from that area... I know this is normal for vehicles when cooling off.. but boy its a loud sound.... just wondering Link to comment Share on other sites More sharing options...
litebeer Posted October 2, 2003 Report Share Posted October 2, 2003 Took mine in for that noise, found this bulletin somone posted on here... DID not seem to help. Oh well. Exhasut Noise Exhaust/Muffler Heat Shield Rattle, Popping Noise Under Vehicle (Install Heat Shield Retaining Straps On Muffler) #02-06-05-005B - (04/16/2003) Exhaust/Muffler Heat Shield Rattle, Popping Noise Under Vehicle (Install Heat Shield Retaining Straps On Muffler) 2002-2003 Cadillac Escalade, Escalade EXT 2000-2003 Chevrolet Silverado, Suburban 2002-2003 Chevrolet Avalanche 2000-2003 GMC Denali, Denali XL, Sierra, Yukon XL 2003 HUMMER H2 with 5.3L or 6.0L Gas Engine (VINs T, N, U -- RPOs LM7, LQ9, LQ4) Except 1500 Series Models This bulletin is being revised to add RPO LQ4 to the Models information. Please discard Corporate Bulletin 02-06-05-005A (Section 06 -- Engine/Propulsion System). Condition Some customers may comment on a rattle/popping noise from under the vehicle. Cause The separation of the muffler heat shield from the muffler may cause a rattle under the vehicle. Correction Install two heat shield retaining straps, P/N 15164621, to the muffler and muffler heat shield. Follow the service procedure below to correct this concern. Link to comment Share on other sites More sharing options...
dcairns Posted October 2, 2003 Report Share Posted October 2, 2003 If you are talking about the sounds it makes as it cools down (engine off), yes. I think it has become less as time goes on, or maybe I just stopped noticing it. It is just the expansion and contraction of the hot exhaust system, nothing to worry about. Link to comment Share on other sites More sharing options...
haynss Posted October 2, 2003 Report Share Posted October 2, 2003 Has anyone changed their muffler and still noticed it? I try to listen when I go out today, but I usually never stay around after I leave my truck. Link to comment Share on other sites More sharing options...
m396 #00-011 Posted October 2, 2003 Report Share Posted October 2, 2003 Heck, my neighbor asked about it But, yes, it's just expand/contract of the exhaust cooling off. Link to comment Share on other sites More sharing options...
SSminneapolis Posted October 2, 2003 Report Share Posted October 2, 2003 my muffler is gone all together...i notice no noise whatsoever... Link to comment Share on other sites More sharing options...
TimB Posted October 2, 2003 Report Share Posted October 2, 2003 I changed my muffler and haven't noticed any ping. Link to comment Share on other sites More sharing options...
GEAR M UP Posted October 2, 2003 Report Share Posted October 2, 2003 I have Corsa exhaust, I have not noticed any noise. Link to comment Share on other sites More sharing options...
TracerSS Posted October 2, 2003 Author Report Share Posted October 2, 2003 I figured it was the exhaust expansion... it sure is the loudest I have heard... maybe when I slow down modding the vette I will get Corsa's Link to comment Share on other sites More sharing options...
bigvette Posted October 4, 2003 Report Share Posted October 4, 2003 Talked GM Rep today about this particular problem.. It IS the muffler!! He took me under mine and we watched as the monster popped as it cooled.. They are not sure what they will do about it and are even less sure as to why it happens........... Link to comment Share on other sites More sharing options...
MustBBrent Posted October 4, 2003 Report Share Posted October 4, 2003 It is the expansion and contraction of the cheap metal stuff they use on the mufflers and the heat shield under the truck. Replace the muffler, and most likely will go away. I have the FlowMasters and no more popping. My wife's suburban pops when she shuts it off. Link to comment Share on other sites More sharing options...
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