The 2004 Silverado 1500 typically uses a four-speed automatic transmission, the 4L60-E; there was no factory manual option on the light-duty 1500 for that year.
In more detail, Chevrolet equipped most 2004 Silverado 1500 pickups with an automatic transmission paired to the common V6 and V8 engines of the time. The 4L60-E was the standard automatic for the 4.3L V6, 4.8L V8, and 5.3L V8 powertrains, across 2WD and 4WD configurations. Heavier-duty trucks in the Silverado line (2500/3500) used different transmissions, such as the 4L80-E or other heavy-duty units. Always verify your exact truck’s transmission using the RPO code label or service documentation, as there can be rare fleet or dealer-installed variations.
Common configurations
Here are the configurations you’re most likely to encounter for a 2004 Silverado 1500:
- 4L60-E four-speed automatic paired with the 4.3L V6 or the 5.3L V8 engines in most 2004 Silverado 1500 models.
- The 4.8L V8 option, when chosen, was also typically mated to the 4L60-E automatic in this year and model line.
- No factory manual transmission option was offered for the 1500 in 2004—automatic transmissions were the standard and most common configuration.
Conclusion: For most 2004 Silverado 1500 trucks, expect the 4L60-E four-speed automatic; confirm with the vehicle’s documentation for your particular build.
How to verify your vehicle’s transmission
To confirm the exact transmission in your vehicle, check the glovebox build sheet or the original window sticker (Monroney). You can also look for the transmission code on the data plate near the glovebox, or consult the VIN-based build sheet via Chevrolet’s resources or a dealership service department.
Summary
The 2004 Chevrolet Silverado 1500 is most commonly equipped with a 4-speed automatic transmission (4L60-E). Automatic was the standard option for that year’s light-duty Silverado, with the 4L60-E serving several engines including the 4.3L V6, 4.8L V8, and 5.3L V8. Always verify the exact configuration on your specific truck to ensure accuracy for maintenance or replacements.