You paid $58 for an oil change!?!? I think the most I've ever paid for an oil change was $22 and that was full synthetic......of course I change it myself, but I can't see paying someone an extra $36 to do that!

Shawn

I hear ya , But it'* new-making it a show car-dealer is the only place I feel comfortable getting service for the Northstar orphan, and I throw that much down for a round of drinks. But I'm putting in a stealth nitrous kit and really want to bring OEM temp. down and there'* no reflash available for gxp pcm.

i thought the 00+ series 2s had a stock 180 thermostat? i thought that was one of the things GM did as part of their redesign?

LittleHov, the 05 gxp is a V8 Northstar, a little off topic in this forum but I seen this post and a couple of us N* owners are scratchin our heads about the cooler thermosat thats being thrown at us all the time .N* v8 has 195 thermostat and runs at 200 consistently.

It'* only an $8.00 part and even if you do get a code thrown (which I somewhat doubt), it'* not going to "screw up" your computer.

If we all listened to the OEM guys, we would never ever do any mods. Someone has to be the first to try things, using intelligence and common sense and then taking calculated risks. IMO, the only risk here is that you may waste the $8 for the 180 'stat, worst case.

the dealership service manager is no auto zone idiot and owns a couple of quaters milers and last years points leader at a local track and knows what he'* talking about.
There is no reflash availablie 4 the N* PCM and I'm just trying to sort this issue out without going thru the trouble of replacing T Stat to find out it made things worse not better And it'* a little more complex than an error code....Pulls timing...Sets choke

Nopers, still the good ole 195*.

All 3.5, 4.0, and 4.6 northstar engines have a 180* thermostat from the factory. That means that the GXP has a 180 stock anyways. There'* no need to upgrade to a 180 on the GXP/Aurora engines.

??? why would mine and every 05gxp owner here that I've talked to have engines running at 200??

the stock gauges are not accurate. They are designed to basically stay in one spot and not move u nless the temperature REALLY changes drastically. They do this so people won't always think there'* something wrong with their car because the temperature deviated from the center mark. I put a 180 in our SSEi and it still read 200 most of the time then too..

also keep in mind that the whole reason the northstar has that lower thermostat is because it'* an aluminum engine that runs very hot. In order to keep it a little bit cooler, it has the lower thermostat rating..