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If the 99 had a 350 vorteck in it, then it will not fit. In late 1999 GM stoped making the 350 engine and redesigned the engine block and Transmission.
You can if the 99 is the new body design / nother words the 99 body will look like the 2003 body. In LATE 1999 chevy REDESIGNED all there engines and transmissions and NOTHING will interchange from 1999 down to late 1999 and up.
Not if it is a classic 1999 siverado.
No it will not.
The 2003 Chevrolet Silverado-1500 has a 5-speed manual.
The 2003 Chevrolet Silverado-2500HD has a 5-speed manual.
Cadillac - DeVille (2000-2005) Rear, DTS (2006-2011) RearChevrolet - Astro (2003-2005) Rear, Silverado Pickups (1999-2006) Rear, Silverado 1500 Classic (2007) Rear, Suburbans (2000-2001) Rear, Tahoe (2000-2001) RearGMC - Safari (2003-2005) Rear, Sierra Pickups (1999-2006) Rear, Sierra Pickups V6 4.3 (2003-2004) Rear, Sierra Pickups V8 4.8 (2003-2004) Rear, Sierra Pickups V8 5.3 (2003-2004) Rear, Sierra 1500 Classic (2007) Rear, Yukons (2000-2001) Rear
The 2003 GMC Sierra-1500 has a 5-speed manual.
The 2003 GMC Sierra-2500HD has a 5-speed manual.
The speed sensor on a 2003 Silverado is located on the transmission. It is just behind the large pumpkin shape that is called the hub.
The 2003 Chevrolet Silverado-2500HD is 18 ft. 6.1 in. (222.1 in.) long.
I have never heard of a transmission tank. Please describe what and where you are talkign about and maybe I can help