So i was planning on getting a tune when i working under my hood today and seen a bosch sensor on the exhaust manifold. i just bought the car, so i out 2 and 2 together thinking about how i just brought my car in for an engine light problem and the service guy told me its been in for an *update* probably for a recall. I cant tell u how many psi im boosting cause im canadian so its in stupid kpa, but do u guys think im tuned or should i ask the gm dealer what the update was?

 

15psi=103kpa
20psi=138kpa
Stock you should be around the low one. Tuned you should be around/above the high one. Sounds like you have /had GMS1.

 

If it has a blue sticker and and says bosch then you have the 3 prong map sensor. Look at your lower charge pipe on the passenger side and if you have the same thing then you have the 3 prong tmap sensor. If your boosting anywhere around 20-22 psi then you probably have the gm stage 1. Just double check with the dealer and make sure.

 

If anything take a picture of the sensors and post it here.

 

I seen a picture of the sensors for gms1 and they are te same as i seen on the manifold, and i boost atleast 130kpa

 

And yeah theres one on the lower charge pipe as well

 

Then you sir - have GMS1. Enjoy.

 

Like above said, you have gm stage 1. Have fun! I'm going to the dealer today to get my flash done! I'm excited

 

everyone gets so excited for a gms1...just skip that, put a downpipe on, get a custom tune and you spent the same amount of money for more fun.

 

^ Without warranty.

 

My car has 10k on it, if **** hits the fan, I want the dealer to fix it. That's why I'm going with gmstg1. Once my warranty is up, I'll go hp tune and then if something breaks, I'll pay for it.

 

replaced a turbo on one the other day with gms1

 

Unless someone already tuned over it.

 

Canadian dealers are pretty chill for that stuff custom tune it and youl blow the doors off alot of cars... trifecta is pretty safe but hp tune is way better for pushing more power ! my buddy has a gms1 tune fully bolted and he laid 272 whp and 290tq i have a trifecta tune 22 psi fully bolted and im pushing 309whp and 332tq..

 

Just so you know through steering wheel controls you can turn it from "metric" to "english" which also turns your RPD over. But thinking about the sitaution if you don't have an RPD it won't help...

 

272hp and 290tq with just gms1? or gms1 with a tune? because those numbers are low if its a tune + gms1

 

^Im thinking he might be talking about gm stage 1 with bolt ons only. I thought the kit was rated at 280 and 320 ft lbs? Those 272hp and 290ftlbs would be the numbers I would expect for stock with gm stage 1.

 

Yea that's all it was just the gms1 in his car ! I have a trifecta tune ! Yea that gms1 kit is a little over rated but it does the job to give you a little more to keep you happy but not for long aha

 

I just got my gm stage 1 installed and I have a question. When I got wot from 5k to redline I get a ringing noise ontop of the turbo spool. Does anyone know why and what it could be? Thanks!