If it's a 1/2 ton then it will be a 4L60E-4L65E transmission.
If it's a 3/4 ton then it will be a 4L80E-4L85E transmission.
4L60E Transmission
What type of silverado and what is the VIN and I'll tell you.
The 2003 Chevrolet Silverado-1500 has overhead valves (OHV).
The 2003 Chevrolet Silverado-2500HD has overhead valves (OHV).
a 2003 Chevy silverado taillight bulb uses a 3157
a 1983 silverado has an TH350, its a three speed tranny. its been said that it's the best transmission that gm has ever produced.
Dextron II
Syn-torq synthetic transmission fluid or equivalent.
Dextron II transmission fluid.
It requires a electronic 700r
If it is a k1500, most likely it has the 4L60E transmission.
DEXTRON II automatic transmission fluid