12638258 NEW GENUINE Rocker Arm Bridge 2001-2023 Chevrolet Silverado DURAMAX 8 Cyl 6.6L Diesel

NEW Genuine GM Rocker Arm Bridge – Duramax 6.6L Diesel (2001–2023)

GM Part Number: 12638258

Brand new genuine GM rocker arm bridge, designed for 6.6L Duramax diesel engines. This component secures the rocker arms to the cylinder head and ensures correct valvetrain alignment and operation.

Sold individually (this listing is for ONE rocker arm bridge).

Compatibility:

• Chevrolet Silverado (2001–2023)
  • Engine: 6.6L Duramax Diesel
  • Models: 2500 / 3500
  • Body styles: Crew Cab, Double Cab, Extended Cab, Regular Cab, Chassis Cab

• GMC Sierra (2001–2023)
  • Engine: 6.6L Duramax Diesel
  • Models: 2500 / 3500
  • Body styles: Crew Cab, Double Cab, Extended Cab, Regular Cab, Chassis Cab

• Chevrolet Express (2006–2016)
  • Engine: 6.6L Duramax Diesel

• GMC Savana (2006–2016)
  • Engine: 6.6L Duramax Diesel

• Cadillac Escalade (2002–2005)
  • 3/4-ton variants

• Chevrolet Suburban (2001–2005)
  • 2500 / 3500 & 3/4-ton variants

• GMC Yukon (2001–2005)
  • 3/4-ton & XL 3/4-ton variants

Notes:

• Rocker arm bridge only

• Sold individually – multiple units required per engine

• For 6.6L Duramax diesel engines only

• Genuine GM part — not aftermarket or refurbished

This is a genuine GM OEM valvetrain component — brand new.
Please confirm part number, engine type (6.6L Duramax), and quantity required before purchase.