What transmission does a 2008 Sierra 1500 have?

The 2008 GMC Sierra 1500 primarily uses a four‑speed automatic transmission, the Hydra-Matic 4L60-E.

In this model year, GM’s half‑ton Sierra/Silverado lineup paired its commonly available engine options (such as the 4.3L V6 and 4.8L/5.3L V8) with a four‑speed automatic rather than a manual or a more modern six‑speed unit. While later GM trucks and higher‑trim variants would see additional gear options, the 2008 Sierra 1500 did not offer a factory manual transmission or a six‑speed automatic in the 1500 lineup. The following snapshot outlines the typical transmission pairings for that year.

Transmission options for the 2008 Sierra 1500

Common engine choices and their transmissions in 2008 are summarized below.

• 4.3L V6 — Hydra-Matic 4L60-E 4-speed automatic


• 4.8L V8 — Hydra-Matic 4L60-E 4-speed automatic


• 5.3L V8 — Hydra-Matic 4L60-E 4-speed automatic

In short, the 2008 Sierra 1500 used the 4L60-E four‑speed automatic across these primary engine options, with no factory manual or six‑speed options offered for the model year.

Notes for buyers and restorers

When evaluating a 2008 Sierra 1500, verify the transmission label or build documentation to ensure it matches the 4L60-E. Some used examples may have been rebuilt or swapped, so it's worth confirming the current transmission model during inspection or in the vehicle history.

Summary

For the 2008 Sierra 1500, the standard and most common transmission is the Hydra-Matic 4L60-E, a four‑speed automatic. There was no factory manual or six‑speed option offered on the 1500 in that model year; six‑speed transmissions appeared in later GM models or different configurations.

What year did Silverado get 6L80E?

The arrival of 6L80E transmissions – or Hydra-Matic 6L80 transmissions – on the automotive scene in 2006 showcased the considerable design change of the automatic transmissions that General Motors created. Before now, every transmission produced by General Motors was practically based on hydraulic controls.
Ask about result

What year did the GMC Sierra have a bad transmission?

Transmission Issues
The 2014-2016 model years may be considered the main offenders, but be aware of the 4L60E transmission on any model year Sierra. This particular transmission from GMC was causing numerous headaches, ranging from erratic shifting to complete failure.
Ask about result

What transmission does a 2008 GMC Sierra 1500 5.3 have?

Drivetrain

How do I tell if I have a 4L60E or 6L80E?

Control like the other GM automatics the easiest way to identify a 4L80 is to look at the shape of the pan. And you can see compared to this 4L60 pan that the 4L80 pan is just enormous.