general problems of the 2003 GMC Sierra 1500

I am an ase master technician, I own an auto/truck repair facility. We are a state of oregon authorized deq repair facility, state of oregon das fleet repair facility, us army base vehicle repair shop and more. Driving my truck to tacoma washington. I was towing a vehicle on in the right slow lane, and "reduced engine power" light came on. Engine vibrated and runs on 1/2 cylinders. Cannot brake or steer, total lack of power. Semi-truck nearly rear ends me as I cannot go over 10 mph. No throttle response, period. I was in road construction zone and everyone was slamming on their brakes to avoid pile-up as I had no shoulder to pull over to. A mile or so later I pulled over, and shut off truck. Restarted few minutes later and cel was on, but reduced engine power lights out. I continued my drive, but now cautiously. It happened 3 more times getting to tacoma, and 5 times returning back to pdx. Now afraid of truck. I finally arrived to my shop the next day and scanned. Codes read maf fail, tps fail. Replaced throttle pedal assy, throttle body with position sensor, wiring to the throttle body, checked grounds, replaced battery and more as stated by gm tech's. Still happens every day. Seems like under low acceleration, engine bucks then cel appears and reduced engine power returns. Gm has no offers or explanations for repairs. I am a certified ase master technician and have never seen or heard of this until I went online to see if this happens to others. This is a major problem with most gm owners in the "fly by wire" type of vehicles. No fixes, no help from gm. This has and is still occurring even today 1/27/2015 with no fixes. Vehicle is being parked until further notice as this vehicle is dangerous to drive. Ase master technician #ow7muoql1stabl.

The contact owns a 2003 GMC sierra. The contact stated that while driving 65 mph, a fire erupted from the undercarriage area. The local fire department was called to extinguish the fire. The vehicle was then towed to the contact¿s residence and had not been repaired or diagnosed to determine the cause of the fire. The manufacturer was not made aware of the incident. The approximate failure mileage was 150,000.

I was driving along and all of a sudden the truck sorta hesitated and lost all engine power at which point I noticed the reduced engine power warning came on and I tried accelerating to try and maybe travel along to pull over at a safe place and come to find I could not accelerate at all, I had to coast to the side onto the grass alongside the road but my fear is that I live close to orlando, FL and travel there at times luckily this has not occurred while there as there are 3-4 lane highways potentially putting me & others in a fatal position if I am caught in a center lane but I try to avoid this for the most part, I either travel on the far left or far right giving me access to the emergency shoulder if needed, but not sure what to do in regards to this problem as I bought this vehicle used and not sure how to go about checking if this is a safety recall issue or not as I am not able to afford a problem like this right now financially. . . And this has occurred like after I bought the vehicle like in three months following the purchase and continued like every other week for like three months straight it has now cut down to like once every three months or so, the latest occurring Nov 21, 2014.

I experience an intermittent problem with my truck that flashes an error code "reduced engine power". This is tied to error code p1516. Usually this problem occurs in colder parts of the year, and on a cold soaked engine, but it has happened other times as well. As soon as the error occurs the throttle shuts and leaves the vehicle with only inertia to attempt to get off the road. This has happened to me on the interstate, and though I have not had an accident yet, I do consider it dangerous. I have taken the vehicle to my local dealer and independent mechanics, and they have been unable to resolve the problem. This seems to be a widespread problem without a solution.