Yes, but the ECM of the 95 would have to be reflashed to remove the interface with the (electronically controlled) automatic transmission.
Yes, a 2003 Silverado transmission can fit in a 1999 Sierra, as both vehicles share similar drivetrains and components since they are part of the same GM platform. However, you should verify compatibility regarding transmission type (automatic or manual), engine size, and any necessary adapter or harness modifications. It's also essential to check for differences in the transmission control systems and ensure that they can be integrated properly.
The 2001 GMC Sierra-2500HD has a 5-speed manual.
The 2004 GMC Sierra-2500HD has a 5-speed manual.
The 2003 GMC Sierra-1500 has a 5-speed manual.
The 2005 GMC Sierra-2500HD has a 5-speed manual.
The 2006 GMC Sierra-2500HD has a 5-speed manual.
The 2003 GMC Sierra-2500HD has a 5-speed manual.
The 2002 GMC Sierra-2500HD has a 5-speed manual.
The 2006 GMC Sierra-1500 has a 5-speed manual.
The 2004 GMC Sierra-1500 has a 5-speed manual.
The 2001 GMC Sierra-1500 has a 5-speed manual.
The 2005 GMC Sierra-1500 has a 5-speed manual.