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Found 14 results

  1. I am having problems with my air conditioning again. My A/C is blowing warm air and this is the second time I have had this problem since buying my 2015 Sierra less than 6 months ago. A few months ago I had the exact same problem and my dealership diagnosed it as a leaking hose and all of the freon was gone. They had to order a new hose and it took a week for it to come in. They installed the new hose and added more freon and it has been fine for the past 3 months until today. This morning I noticed that the air coming out was warmer than normal even though I have the A/C set at 65 degrees. It was fine yesterday. I am going to monitor it and see if it gets worse and if so make an appointment to take it to the dealer again. Just wondering if anyone else has had to replace the hose or had a freon issue with their 2014 or 2015 Sierra / Silverado?
  2. Thinking about doing an intake, exhaust, and tune to my new-to-me 2017 Sierra 1500 5.3L 8 speed. I miss the throttle response my 2013 6.2L had, it would lurch forward at the slightest tap of the gas. I also want to hear the engine, its so quiet! Cold air intakes seem to be disputed for having any performance gains, so are they really worth the $$$ in terms of better air flow? healthier engine? sound? any words of wisdom? Your $0.02 is always appreciated! I'm looking at the Magnaflow 15267 catback as it seems to sound pretty good for what I'm going for. I've read that there is a flap in the factory exhaust system that creates back pressure for AFM shift into V4 mode. I do like V4 mode and would not want to go away with it. How can a catback system integrate this feature? Also, what would be the rough performance improvements if any from a catback exhaust? Any other options that would sound similar and perform better/keep V4 mode for around the same price as Mgnaflow (~$800)? As for the tune, I know ZERO about tuning but do want to get rid of the rev limiter, speed limiter, get some performance gains without having to put midgrade or premium fuel in. How does the tuning process work? about how much do they cost? how can it be adjusted in the future? I assume anything like this would void some sort of warranty? Anyone do something similar and can attest to their experience with an intake, tune, exhaust?
  3. John Goreham Contributing Writer, GM-Trucks.com 1-30-2019 Record cold temperatures have forced the shutdown of manufacturing plants, including those that produce the Chevrolet Camaro, Chevy Traverse, Sierra, and Silverado models. In all, 17 plants have been closed for multiple shifts. It isn't the cold itself that is the problem, but rather limitations on the supply of natural gas to the Consumers Energy utility that supplies power to these plants. The cold already was placing a high demand on the infrastructure, but a fire at a Detroit-area natural gas compressor facility made the situation worse. The Lansing State Journal has reported that plants in Lansing Delta Township Assembly, Lansing Grand River Assembly, Lansing Regional Stamping and Lansing Grand River Stamping as well as plants in Flint, Pontiac, Bay City, Saginaw, Warren and Orion Township have all missed shifts. The situation is also affecting Ford and FCA America plants.
  4. I think I might have an injector issue. I'll first give the symptoms and what I've done to diagnose it, but the one thing I cannot find on here or the interwebs is how to replace the fuel injectors on my L86 engine. I understand it's a GDI engine and not as simple as a port fuel injection engine, but I figured there'd be something out there...no go. I'm pretty sure I've read every thread on here about cold start/injector issues, but pardon me if I state something that's already been said. Not looking to rehash any other threads, just get thoughts on my situation and others experience with replacing these GDI injectors. My truck is a 2016 GMC Sierra Denali, 6.2L, 8 speed, 75k miles. Only run 93 octane fuel and all routine maintenance is completed on-time or early by me. Only use top end recommended products in all maintenance. Symptoms/Diagnosis My issue is only a cold start issue and it's intermittent, but now happening more frequently. It drives fine with full-power and has no other issues. The cold start issue first came up around 70k miles when I did an auto-start in my driveway. I could hear the truck struggling to keep rpm's, it sounded like it was barely chugging along. I opened the door and looked at the rpm's and they were bouncing like crazy. Truck stalled out and threw a code for cylinder 3 misfire (P0303). I cleared it and it started up perfectly. I chalked it up to it needing spark plugs/wires replaced (had original OEM still in). I did so the next weekend with the OEM ACDELCO iridium plugs and Taylor 10MM racing wires (much better than stock). She cold started flawlessly for the next 5k miles and the issue was long gone in my mind. Fast forward about 3 weeks ago when it did it again after sitting in my work parking lot all day. The code this time was P0106 (MAP Pressure Sensor reading issue). I installed a CAI system (aFe Power Momentum GT) around 72k miles, so I figured maybe I accidentally messed up the MAF sensor in the install (even though it was fine for 3k miles). So I replaced the MAF sensor. Was fine until a week ago, when it had another rough cold start but didn't throw a code. I assumed it was the P0106 code again so I replaced the MAP sensor this time. Good for another week and now it's had 2 rough starts this week and stalled once right after starting, so getting progressively worse. This time it threw the P0303 code again. I happen to be borrowing a tech tool and did a diagnostics check on the cylinders and it showed cylinder 3 has had 699 misfires, the next highest was 19 (both cylinders 6 and 8). I also checked the code history on the ECM and it showed P0106 (map sensor pressure fault), P0300 (multiple misfires), and P050D (cold start rough idle). I read the cold start rough idle can also mean coolant is leaking into the oil and/or through the head. I have not noticed my coolant running low, regardless I change my oil and just did it as recently as last weekend, but it's never looked milky or smelled like coolant. I also checked all the head bolts and around the head gaskets - didn't see any coolant. Ruling everything out to this point, all I'm left with is bad seals on injector 3 that's allowing leak back during initial engine start - causing the misfires on cylinder 3. What's strange is that about 20 seconds after start-up the idle evens out and drives smoothly the entire time. It's only a rough cold start intermittently (getting more frequent), but no other issues. Am I missing anything? How-to on replacing GDI fuel injectors? I've read how costly it is for a shop to change out these GDI fuel injectors so I was hoping to do this on my own. I do 90% of my repairs/maintenance - with exceptions to major work. This is the first GDI engine I've owned so I don't want to jump into something and cause more damage - but I feel confident I can learn and do it right. Are there any instructions/how-to's on doing this job? From what I understand, with a GDI engine the pressure is much greater in the fuel lines so it's important to properly relieve the pressure. Also, I've read that I may need to replace the fuel injector rails/lines when I replace any injectors due to the stainless steel being so soft that it will leak in no time after replacing only the injectors. I don't mind spending money on the right tools if it'll save me money in the long run. Thoughts on doing the job myself? PS - I've searched YouTube and Google for ANY instructions (even for other GDI engines) and have found nothing on how to bleed the fuel pressure, just videos about putting on new injector gaskets.
  5. My 2016 Sierra 2500HD has 176,000 miles on it already and recently started eating parts. The latest part to fail was the reductant tank heater (DEF Heater). Upon cold start the check engine light came on with code P21DD. After a little reading I learned that this can result in “Limp Mode”. I was in the middle of nowhere in Northern Wyoming. Not cool! I drove down to Denver and replaced it that week. I shot this video of the repair.....
  6. 2006 Gmc Sierra 1500 SLT In KY this year we had some snow so I got out to play in it last night and went to get on it alittle and when I did all my lights inside including my radio dash and even headlights shut off for maybe two seconds like the key had been turned off (truck is still running) and then came back on after everything came back my battery light was on. It is a new battery from end of 2017. Got home had to run back into town and got on the brakes hard one time and didnt complety shut down on me but the lights surged hard having a hard time finding anything on this any input would help.
  7. I live in New York and this morning the temp read 16 degrees in the truck. I noticed the steering was noticeably stiffer. Even after a 10 minute remote start and 15 minutes of driving it continued to feel this way. When I left work in the late afternoon is was 26 degrees and the steering felt the same as it did in the morning. I've lived in NY my whole life and never experienced this in any other car I've owned. Being it's my first winter with my truck I have to ask-does anyone else experience this or is my issue completely unrelated to the weather?
  8. I have a 1999 chevy silverado 2500hd with a 6.0 The air was stuck on cold so I looked at the actuator and it is working properly. Both hoses in the engine bay are hot. I took off the actuator and tried moving the blend door and it is stuck. Any way to free the blend door so it will open with the actuator?
  9. 2015 chevy 1500.. 3400 miles. A couple of times the heat didn't work. It always did "next time".. the other day I had to take a 3 hour drive.. it didn't work the whole way there...stopped for an hour..headed back still with no heat (it was 42* so it was not pleasant) Took to dealer - they said they cant find anything wrong, of course, and of course the he was working fine. Its only done this a couple of times in the past 2 months now. Anyone experienced anything similar? It blows out air, and it will adjust the fan speed properly (or what I'm guessing WOULD be properly if it was blowing out heat) based on the temp of the cab. Even when taken off of auto and just turned temp to hi and fan speed up, with AC button off, it was still blowing cold air. Any ideas? Could it somehow be user error? (doubtful) Also when the AC button is on, even when its on heat, is the AC really still running? seems dumb that lights always on even when you have the temp high and its blowing heat.
  10. Sitting storage wheels lockup seized brakes differential transmission issues emergency brake release skidded to stop 2 two years cold weather moisture
  11. I left a secondary car sitting for two years. Today, I returned the battery to the truck and started it. After two cold Michigan winters, it started with little hesitation. I put the truck in drive and started moving down the drive way. Everything seemed normal until seconds later and about 15 feet, the truck jerked to a stop. I shifted into reverse and shifting felt normal. Again it locked up. I tried to go forward but this only resulted in squeling the rear wheels. The rear wheels where moving (for sure on one side). After a while, I decided to play with the emergency brake. If I compressed the pedal and then released it, the truck would move forward like normal but only a few feet this time. I tried the same in reverse but it didn't move anywhere. I was thinking this is the result of seized calipers, gears/teeth loose in the differential, or the worst of my worries transmission issues. Anyone have this happen to them or know someone it has happened to? I'll be taking off the wheels soon to see if I can spot the problem. Let me know if you think of what the problem could be or ideas on what to check. Thanks!
  12. Hi everyone, Just recently took my 2014 Sierra SLT for a long drive in the cold weather 21F. As I was driving with the heat set on 72F Auto, I noticed that I seemed to feel a chill, so I turned the heat up to 75. Still felt some cold air so I started to see if perhaps the defroster or dash vent were leaking any cold air - nope. Then I put my hand down next to my right leg and noticed an ice cold draft coming from all the seams of my console. Just putting my hand down into the deep well in the front of the console revealed that the thing is freezing! Cold air leaking from every crack, all the storage spaces are cold also. Make me wonder if anything under the console is open to the elements somehow, there seemed to be enough pressure to make the cold air escape out all the cracks. Thoughts? Anyone else notice this? Thanks, Dave
  13. Hi, this is my first post, and my problem is that my chevy express van 2005 5.3 vortec idles low RPM at cold start, about 600 RPM, it doesn,t stall but shakes a little. I have to step in the gas until it warms. Hope you can help me with some ideas.
  14. Hello everyone, I recently acquired a 2005 GMC Sierra with the L33 5.3, 4L60E automatic, and push button 4x4. Every morning since I got the truck, there has been a strange issue that I can't seem to figure out. When the truck is cold, I can't seem to get the gear shifter out of park and into any gear. It just seems stuck. I can pull it back to 'unlock' it or whatever you call it, but it just doesn't want to move. No matter how hard I press the brakes, nothing happens. Once it is warm enough, I can hear it click in the column, allowing the shifter to move throughout the gears. After a few minutes of sitting with the heater on, for whatever reason, it will finally operate normally and then its fine for the rest of the day as long as the truck warms up first. Today, it was stuck 3 times because I only drove 1 minute at a time to each of two destinations. The brake lights operate normally when cold so I don't think it is a brake switch issue. Anyone have any ideas on what to check or what the problem could be? Its seriously bugging me.
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