Or, you can go to any of the troubleshooting guides for these transmissions:ĤL80E Transmission Problems– This transmission came in some of the heavier duty HD truck models.ĤL60E Transmission Problems– The 4L60E was far and away the most common transmission that came in these trucks.Ĭheck Engine Light– Before doing any serious work, if you have a check engine soon light, go ahead and have it scanned to see what trouble codes it is throwing out. The NV3500 is a lot simpler piece of machinery. Most of the advice and information is applicable to the two automatic transmissions that came in almost all these trucks.
This section is being presented to you as a top-level troubleshooting guide, to help you determine what’s wrong with your 2004 Silverado’s transmission, and what is needed to fix it. Here’s a whole section on Allison Transmission Problems.Ĭommon 2004 Silverado Transmission Problems MW7 or W74- Allison Transmission, If you have a diesel Silverado there’s a high likelihood that you may have one of these two transmissions.MT1– This is the 4L80E automatic transmission.It is a four speed overdrive transmission.
It is the only manual available for the 2004 Silverado. MG5– This is the NV3500 manual transmission.The transmission options that were available to the 2004 Silverado were as follows: is a great resource to lookup all the codes for your Silverado beyond the transmission codes that are listed above. You’ll find everything you’d want to know the options on your truck from this list. The RPO codes are a list of production options that are printed and stuck in your truck s inner glove compartment when it is manufactured. The easiest and quickest way to go about determining this is by RPO codes. It is necessary to determine what kind of transmission is in the truck. The 2004 Silverado was a carryover from the 2003 model year. Below, you’ll find a ton of troubleshooting your transmission problems. These trucks are getting older, and it is hitting the point that your 2004 Silverado may be having transmission problems. The 2004 Chevy Silverado was the 6th model year of the GMT800 platform truck.