GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

CCV Delete on GM Engines � Worth It or Just Risky?

zunepuh — Wed, 20 May 2026 17:52:22 GMT

Hey guys,

I�ve been reading a lot about CCV delete on diesel and performance trucks and I keep seeing mixed opinions. Some people say it helps reduce oil buildup in the intake and keeps the turbo/intercooler cleaner, while others say it can cause pressure issues or long-term engine problems if not done correctly.

For GM diesel owners especially, has anyone here actually done a CCV delete or reroute on their truck? Did you notice any real performance gains, or was it mostly just cleaner intake components? Also wondering if it affects reliability, emissions compliance, or daily drivability over time.

Would you recommend a catch can or reroute instead? Would appreciate real-world experiences from GM truck owners.

Best Upgrades for More Power and Reliability on an L5P Duramax?

zunepuh — Tue, 19 May 2026 14:29:18 GMT

Hello everyone.

I�ve been researching ways to improve towing power, throttle response, and overall drivability on my L5P Duramax without sacrificing reliability. There are so many options available, from intake systems and exhaust upgrades to tuning and transmission improvements, that it�* hard to know what actually makes a noticeable difference.

I�m especially interested in hearing real-world experiences from owners who have already tried different setups. While searching online, I came across several discussions about L5P performance mods and wanted to ask which upgrades gave you the best balance of horsepower, fuel economy, and long-term durability.

What combinations would you recommend for a daily-driven truck?

1998 CHEVY LUMINA STERING WHEEL OFF

RZIRBEL — Mon, 18 May 2026 17:17:16 GMT

i HAVE A 1998 chevy lumina with a 3.1l in it. i had to replace my steering culume and i forgot to alight the mark on the sterring shaft with the mark on the steering wheel. my car drives straight but my wheel is way off. i had to remove my steering wheel to replace the turn signal switch. how do i ger the steering wheel back to ware it needs to be.

2025 GMC build sheet

Ray61 — Sun, 17 May 2026 11:04:32 GMT

I am looking to buy a used 2025 GMC Serria and would like an accurate build sheet. I have used the VIN decoder offered on this forum, but it is a little confusing on what is actually on this truck. Is there an actual build sheet available? Thanks RAy

2005 Cateye, windows and radio quit randomly.

G3Auto — Thu, 07 May 2026 15:05:12 GMT

I recently picked up a 2005 Chevy silverado 1500 4wd and it does amazing but randomly the windows and radio quit working sometimes the A/C too. Ive checked a lot of my grounds, new ignition switch, all fuses check out good. I would really appreciate some pointers, was hoping maybe somebody has experienced this before with their vehicle and got it fixed.

2025 equinox fuel filler pipe

chevyowner — Tue, 05 May 2026 16:04:11 GMT

gas station broke the little flap door on my equinox. I ordered a new filler pipe part number 26582050 I don't see screws when I open the fuel door twin hook the filler pipe? Are there clips on the inside to release the pipe from the quarter panel? I can't find any videos anywhere. Any help surely appreciated

Ambient Temp Sensor

WilliamE — Sat, 02 May 2026 19:28:44 GMT

Have any of you ever dealt with a bad temp reading on the DIC, and it is not fixed by replacing the sensor?
I have had the issue for a while, tricked it with a 2ohm resistor for a bit, but the temp reading would say from ICE to 43F, and it would be 75F out.
I may try to replace the sensor connector..
But the main thing I am trying to figure out without digging out my FSM is where do those wires terminate inside, I have auto climate so I am thinking they come in the big harness with the radio and all, and terminate at the air control unit?
It is maddening not to be able to have AC when it gets really warm, and while we have a cool few days here I figured I'd get on it before the heat of Summer hits..

Hope all of you ole timers are well!

PK2 Problems

Coreyhall49 — Sat, 02 May 2026 03:39:30 GMT

I�m having to replace the BCM in my 02 Trans Am and I don�t want to bypass the pk2 system (also highly unlikely it�* possible because I don�t know the resistance of the key for this BCM) I was wondering if I could use Tech2Win or another software to reset the resistance value stored in the new BCM to recognise the key. I�m going to buy Tech2Win anyway for proper diagnostics for both of my vehicles but just curious if any seasoned GM techs know a way to do this. Any help is appreciated TIA

2012 Equinox misfires and stalls

SullyCTDad — Thu, 30 Apr 2026 18:09:17 GMT

I have a 2012 Equinox that has recently been misfiring and stalling (very frequently). My mechanic has run his scanner on it and got the following codes (see attached). We�ve replaced the O2 sensors, MAF, MAP and VVT solenoids and it hasn�t improved anything at all. We�re both frustrated. He thinks it�* an electrical issue, but we can�t determine where.

Century steering shaft replacement

Dealy663 — Thu, 30 Apr 2026 04:53:08 GMT

Hi

My aunt has a 2001 Century with what appears to be a broken steering intermediate shaft. Does anybody have a guide on how to replace this? I�m pretty handy with a wrench and have done lots of things on cars before, but I�ve never worked on steering. I�ve already removed the lower pinch bolt and turning the steering wheel does not turn the wheels at all, and the steering rack does not seem to get any input from the steering wheel. With my finger inside of the boot above the rack when turning the wheel, I cannot feel the joint, turning at all, and in fact, I feel like something is flopping around in there, which I assume is just the intermediate shaft broken in half.

One of the things that does appear to be making life more difficult underneath the car is the boots on the intermediate shaft, and then the boot coming from the steering column to the joint where the intermediate Shaft connects to it. How do you get these boots off?

any links to guides relevant videos, would be appreciated.

thanks, Derek

PUT IT IN REVERSE TERRY

SirN9NE — Tue, 28 Apr 2026 01:25:20 GMT

�sometimes I need a jump to start it it�ll run but when I put it in reverse it�ll shut right down. I have no codes changed out the alternator, module, there are no misfires, I got the battery tested it�* fully charged no dead cells I�m not sure what to do next. Any ideas or someone dealt with an issue like this?

2021 Silverado 2500 Duramax Problems and Limp Mode

Brew99 — Mon, 27 Apr 2026 04:44:01 GMT

Love the power and torque of my 2021 Silverado 2500 Duramax Chevrolet, but not happy with the frequent breakdown and limp mode for some Chinese components in electronic on the truck that are breaking prematurely and some other engine parts are broken and sensors it�* not acceptable for Chevrolet. Such a nice truck to have it somewhat unreliable and leave people on the side of the road or in limp mode couple of times a year it seems like. Today actually I helped a gentleman on the side of the road his new Silverado Duramax with 49K was on the side of the road. He was hauling horses in a trailer and I stopped helping he was in limp mode and was unable to drive the truck further and he was on a long vacation so it�* quite complicated especially with the horses and just complete failure by General Motors to make a reliable truck that fails at 49K and leaves him on the side of the road in a dangerous situation.

1999 Bonneville Belt Tensioner Questions

obe — Sun, 26 Apr 2026 01:25:50 GMT

1999 Pontiac Bonneville. So I'm changing out the tensioner. One of the two steel nipples that mount to the tensioner with a bolt that goes to the heater core has a spring assembly in it. It is in bad shape and in need of replacement. I broke out all the remaining pieces and the spring so the debris won't go through the cooling system if I have to use it. If not available I guess I'll find out what effect not having the assembly in the steel nipple will have on heat come winter. Part number for the steel nipples and o rings that go on them would be helpful.