Hey guys I don't know if this is a repost but I just got a letter from GM. Apparently they have finally figured out what we have been tellin the, for 2 years. The cat on the 07 lsj is a POS. The letter basically states that the cat has failed and thrown check engine lights and resulted in loss of engine power. It says if u believe ur car is having this issue contacet ur local dealer to make an appt to get it checked out and replaced for free. They have also extended our smog warranties on these models to 10 year or 120,000 miles to cover this issue. Also says there is a number to contact if you got this problem fixed before the announcment and caused you to pay out money either for a new dp or smog retest because u didnt pass for reimbursment. Just curious if anyone else has got this letter. Any questions guys just ask

 

i got this letter, i have noticed a bit of hp difference, and i have had my CEL thrown but it went away, so im gonna go and see wats up with it,

 

Got my letter yesterday. lol

 

I took my letter to where I used to work and said "I TOLD YA BITCHES" lol

My new cat is gona be here Monday.

 

I got the letter yesterday not sure if im actually going to take it up there or not.

 

yea its funny how we have only been tellin GM this for years and they finally listened.lol

 

It's not just 07s. All LSJs got one. (I got one last week)

 

I haven't gotten a letter, but I do throw the P0171 (system too lean) code here & there. I have a 2007 with an Injen intake, Stage 2, & HPtuned. Heard it's pretty normal though....the code that is.

 

I never got a letter. But I should be fine on the cat. Mine was replaced not too long before I bought the car, so the Cat is not even 5,000 miles old.

 

i got the letter earlier this week and i dont care cuz im not stock haha

i have the dp chilling in the garage so they can look at it off the car

 

usually caused by dirty maf sensor, tb or the cat ikssue.lol. And i didnt know it was all years. I mean i figured of course it would be because our stock cats r crap and only last 15k but my letter says 07 so yea.lol

 

I got one too for my 07...I dont know if it just me, but sometimes when Im at wot it goes then it does a slight hesitation like something was backed up in the exhaust and then goes back to normal...wierd

 

so the only way to know if you need it replaced is if the words"engine power loss" appear?

 

yea had the same problem till i had that damn cat replaced.lol.

 

no letter yet here yet. I gutted my busted up cat and re-tuned my car over a year ago.

 

lol...glad its not just me then...lol

 

I think it might be the MAF. I just never got a letter.

 

LOL yeah got my letter the other day but hell I had to have the dealer replace mine back in 07 under warranty LOL. O well if it goes out again they can replace it for free again LOL hears looken at you GM

 

yea well i was just informing everyone. its kinda nice that GM has extended the warranty to 10 year or 120,000 miles. See in cali we have to get it smoged at 6 years and the smog warranty is only good for 5 years so the warranty did us no good.lol

 

so is it just a new cat or a new designed cat?

Dont want to have to keep replacing ever so often...

 

then get aftermarket...

and what code is shown or wat does it say on the cluster when this problem occurs

 

i got my letter a few days ago, nothing has gone wrong yet but im going to bring it to the dealership and say that there should be more power, then they'll give me more power. man i wish it was that easy

 

its supposedly supposed to be a etter cat but who knows and it wont nescarrily say anything. it is up to the dealer to decide if u r having the issue

 

Who the hell has the stock cat anyways lol. I laughed when I got the letter. Mine has been off for a few years.

 

I still have the stock cat