Browse our selection of quality automatic transmission downshift relay parts designed specifically for your GMC C1500. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.
Sierra · Sierra SL · Sierra SLE · Sierra SLT · Sierra SLX · Sierra Special
Extended Cab Pickup · Standard Cab Pickup
V6 4.3L · V8 5.0L · V8 5.7L · V8 6.2L · V8 6.5L
Automatic · Manual
