The GMC Sierra 1500 was equipped with the 4L60E in early models, and 6-speed 6L80 in later models and 8-speed
8L90 in 2015+ models. But they aren’t without their problems though, so let’s look at some of the most common GMC Sierra 1500 transmission problems, look at cost estimates and figure out what you can do about them. Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and
model. What Transmission Do I Have?GMC Sierra 1500: 4L60E Transmission GMC Sierra 1500 Transmission Replacement Cost EstimatePricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#. Replacement GMC Sierra 1500 Transmission Prices:
What are the DTC codes related to GMC Sierra 1500 transmission problems?
GMC Sierra 1500 Transmission RecallsRecall 14V152000 – Transmission cooler line leak – 6L80 Transmission Summary – Consequence – Remedy – GMC Sierra 1500 Technical Service Bulletins (TSB)TSB 05-07-30-017B – Water contamination – 2004-2006 GMC Sierra 1500 4L60E TSB PIP4051C – Harsh Shifting – GMC Sierra 1500 4L60E TSB 01-07-30-002C – Transmission stuck in third gear with inoperable instrument cluster and multiple DTC’s – 4L60E Transmission & 4L65 Transmission TSB 01-07-30-023B – Harsh 1-2 upshift with P1870 DTC – 4L60E Transmission RPO M30 TSB 08-07-30-027 – No movements when transmission is shifted into Drive or third – 4L60E Transmission – 4L65E Transmission – 4L70E Transmission TSB 00-07-30-022D – No reverse, second or fourth gears – 4L60E Transmission
& 4L65E Transmission TSB 01-04-17-004B – Clunk, bump or squawk when vehicle comes to a stop, or when it is accelerating from a complete stop – 4WD/AWD vehicles with a one-piece propeller/drive shaft only TSB 06-07-30-007A – Harsh 1-2 shift with P0894 DTC – 4L60E Transmission | 4L65 Transmission | 4L70E Transmission TSB 08-07-30-008B – Diagnostic information for P0894 and P1870 DTC – 4L60E Transmission | 4L65 Transmission | 4L70E Transmission TSB 04-07-30-028A – Transmission fluid leak from reverse servo cover – 4L65E TSB 08-07-30-016 – Slipping, refusal to shift, overheating GMC Sierra 1500 4L80E TSB 08-07-30-001 – 2001-2006 GMC Sierra 4L80E TSB 08-07-30-015 – 2002-2007 GMC Sierra 4L80E TSB PI488C – No forward or reverse and/or slipping – 6L80 Transmission | 6L90 Transmission The transmission should also be evaluated for any possible distress to the clutches. GM’s testing and analysis found that split or damaged filters may be caused by a damaged transmission pump. This can send a high pressure fluid spike down the filter neck on a cold start, resulting in the filter body cracking or the filter seam splitting. The filter is not defective and this is not a filter quality issue. Important: Do not replace the filter without inspecting the pump. Failure to inspect the pump and clutches could lead to a repeat of this condition. TSB
09-07-30-004J – Slips in Reverse or Third, Delayed Reverse or Drive Engagement, DTC P0776, P2715, P2723, Harsh 2-3 Shifts – 6L80 Transmission | 6L90 Transmission Common Problems with the GMC Sierra 1500 TransmissionIntermittent harsh shifting – GMC Sierra 1500 4L60E Solenoid DTC’s – GMC Sierra 1500 6L80E Lack of Response Can I drive with a transmission problem?If your GMC Sierra 1500 can still make it up and down the road, you might say “It’s fine, I’ll just drive it until I can get it fixed”. But that is not always a good idea, depending on the symptoms. You see, there are a lot of (very expensive) moving parts inside of a transmission, and if something isn’t right, continuing to drive with a transmission problem could damage something else. How often does a GMC Sierra 1500 transmission need to be replaced?The overall lifespan of a GMC Sierra 1500 transmission largely depends on how well it was maintained. Factory design flaws also factor into this equation, along with how/how hard you drive. But on average, we’ve seen the GMC Sierra 1500 transmission last for between 130,000-180,000 miles. A high quality replacement transmission however, can last considerably longer if all of the factory design flaws have been addressed and the vehicle has been maintained. How are GMC Sierra 1500 transmission issues diagnosed?It is fairly easy to guesstimate what the root cause of your GMC Sierra 1500 transmission problems might be, but you won’t truly know unless you have the right tools and experience. A good mechanic or transmission repair center will be able to connect your truck to a computer and find out which diagnostic trouble codes (DTC’s) have been stored. Once they know what to look for, they can perform a visual inspection to verify the problem. How is a GMC Sierra 1500 transmission replaced?In order to replace your GMC Sierra 1500 transmission, the truck has to be lifted from the ground in order to gain access to all of the parts that will need to be unbolted. Then the transmission can be lowered to the ground (typically with a transmission jack), so the new transmission can be installed. Once it is in place, for the 6L80, the vehicle PCM will have to be reprogrammed / reflashed to accept the new transmission using the latest GM subscription. Recommendations for GMC Sierra 1500 transmission issues?To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman GMC Sierra 1500 transmission here, then find a local shop using our Find a Shop guide to install it for you. How to Solve GMC Sierra 1500 Transmission ProblemsSolution A: Buy a Used GMC Sierra 1500 Transmission The quickest way to fix your transmission problems is to simply buy a used transmission or used transmission. These can be found at most junk yards, and they often come with a 30-90 day warranty. However, there’s no way to determine the actual condition of the internal components, so you could be spending a bunch of money to have the exact same problems. Plus, that warranty only covers the transmission if it’s defective, not the labor costs that you’ll have to pay. Solution B: Buy a Rebuilt GMC Sierra 1500 Transmission Another option would be a rebuilt transmission or rebuilt transmission. A local repair shop will remove your transmission, then install a bunch of new parts during the rebuild. The problem here is, the skills and experience of each transmission rebuilder will vary widely from shop to shop, so you could have problems from something that wasn’t adjusted properly. And the 1-2 year warranty might only cover you at certain transmission repair shops, in a specific geographical area. Solution C: Buy a Remanufactured GMC Sierra 1500 Transmission Many owners depend on their vehicle to commute and get things done. Their gasoline engines are designed to go 100’s of thousands of miles, so it makes sense to invest in a remanufactured transmission. Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model. What Transmission Do I Have?What Problem Does Your GMC Sierra 1500 Have?Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too! What transmission does a 2002 GMC Sierra 1500 have?Retail Price. What kind of transmission does a GMC Sierra 1500 have?10-Speed Automatic Transmission features closer gear spacing that allows the engine to operate in an optimal range at all times with varying load and terrain conditions.
How do I know what transmission I have in my GMC Sierra?The simplest way to find your transmission type is to look in your owner's manual. Your manual should have the name and type of transmission, along with service information. If you've misplaced your owner's manual, most trucks have a white label printed on the inside of the driver's door.
Do GMC Sierras have transmission problems?Along with other Cadillac, Chevrolet and GMC models, 2014–2019 GMC Sierra trucks have been reported to experience harsh engagement of gears, shifting problems, transmission slipping and difficulty stopping.
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