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Found 4 results

  1. I have 2021 AT4 with the 6.2L, just recently a check engine light has come on and am a bit stumped on it. I have read the codes on the ODB11 and the reader I have shows a P2CB9 code but it give me an "information unknown" reading. My GMC app however tells me that nothing is wrong and all systems are normal. I search online and find that the P2CB9 code is a "cooling fan 2 underspeed" however I live in Canada, its -25 degrees Celsius outside and there should be no reason that cooling fan 2 needs to run, or if I need to get it to run, its too cold out to try and get it to engage. Would taking the negative battery post off reset this code? its not like its immediately urgent in my life to get it to the dealership due to im not worried about it overheating, but its blocking my command start from working and its pissing me off because its cold outside. Am I chasing the right rabbit? Thanks in advance
  2. 2014 GMC SIERRA SLT 1500 CREW CAB SHORT BOX, 6.2L SUPERCHARGED with Bose Audio System, Navigation, 8" touch screen, Heated and Cooled Bucket Seats, Power Sliding rear window, tilt and Telescoping Steering Wheel, Max Trailering package (9.76 rear axle, 3.73 gears, enhance cooling radiator,trailer brake control), msrp $52,395, very good condition "like new" very fun to drive and very strong and responsive!!! I copied basically what "Hennessy" was doing for their performance packages. The Truck has the following upgrades: Whipple Supercharger Kit (WK-1004B-62) install when I had 3366 miles so about 9300 trouble free miles on the supercharger American Racing Headers w/ high flow Cats Magnaflow Muffler (custom exhaust that dumps out passed differential) Dyno tune (stock maf, just tweaked the Whipple "canned" tune and dialed in nicely at 520 rwh 526 rwt, with 22% drive train loss that about 634 HP @ crank @ 4500 feet elevation) Catch Can RX (installed when it had about 1500 miles on it, due to the newer motors having direct injection, important to have installed and really helps reduce "coking" on the back of the valves. 20" Badlands w/ 305/55/20 Goodyear Kevlar AT (drives excellent, great tires! with loads of tread on them) 6" Zone Lift w/ new leaf packs on rear (no blocks) Fox shocks in rear, Billstein in front Hellwig sway bars in front and rear BDS traction bars Air Bag system w/ automatic self leveling (works great, it keeps the back end right were it is set at) AMP Research Steps Diamond Back tonneau cover Rear under seat storage bin (forget the name of it) Custom badging on the hood "LS3 Supercharged" (purchased from a vet shop) Paint matched smooth fender flares About 24k invested in upgrades. *all performance work was done by Premier Complete Auto, very reputable shop in Utah, all suspension work was done by Ultimate 4x4 $57,000 12k miles PM for questions and pictures
  3. Hey Guys, I drive a 2009 GMC Sierra Crew Cab 4x4. I noticed something that concerns me today when I was driving on the highway. I had the open highway to myself tonight and decided to push my gas pedal down! and come to my notice my truck wont go passed 160KM/H, the HUD display that the truck can drive 200KM/H? What's going on?
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