https://www.gmforum.com/ When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. en Wed, 20 May 2026 03:59:30 GMT vBulletin 60 https://www.gmforum.com/images/misc/rss.jpg https://www.gmforum.com/ https://www.gmforum.com/gmc-chevrolet-truck-suv-177/best-upgrades-more-power-reliability-l5p-duramax-315667/ 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... 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? ]]> GMC/Chevrolet Truck/SUV zunepuh https://www.gmforum.com/gmc-chevrolet-truck-suv-177/best-upgrades-more-power-reliability-l5p-duramax-315667/ https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2025-gmc-build-sheet-315665/ 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.... 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 ]]> GMC/Chevrolet Truck/SUV Ray61 https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2025-gmc-build-sheet-315665/ https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2005-cateye-windows-radio-quit-randomly-315664/ 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,... 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. ]]> GMC/Chevrolet Truck/SUV G3Auto https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2005-cateye-windows-radio-quit-randomly-315664/ https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2021-silverado-2500-duramax-problems-limp-mode-315654/ 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... 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. ]]> GMC/Chevrolet Truck/SUV Brew99 https://www.gmforum.com/gmc-chevrolet-truck-suv-177/2021-silverado-2500-duramax-problems-limp-mode-315654/