The 2006 GMC Sierra typically comes with a variety of speaker sizes depending on the trim level and options. The front door speakers are usually 6.5 inches, while the rear door speakers are often 6.5 inches or 6x9 inches, depending on the configuration. Additionally, some models may have a center channel speaker in the dashboard, which is generally smaller, around 3.5 inches. Always check the specific model and audio system for exact specifications.
The speakers in a 2006 GMC Sierra 1500 crew cab are 6.5 inches. However, the speaker manufacturer will refer to this size as 6.75 or 6 3/4 inch speakers.
4x6 are the size of the door speakers on 2004 GMC Sierra. Standard cab
The stock size of the speakers in a GMC Sierra are 4x6 in the rear. If they have not yet been switched out with an aftermarket, they will be the 4x6.
All four speakers are 4x6. I just ordered new 4x6's for my 93 GMC Sierra, and that is the stock size.
6.5" round door speakers
The 2001 GMC Sierra has 6 1/2 inch speakers in the front as well as in the rear.
The 2006 GMC Sierra-1500 has a 4.3 L base engine size.
The 2006 GMC Sierra-2500HD has a 6.0 L base engine size.
The 2006 GMC Sierra-2500HD has a V8 engine.
2006 E250 speaker size is 6x8"
usually 6.5 or 6.75 (same mounts, same speakers)
6.5