Genuine 2018 GMC Sierra Rear Crossmember

Rear Suspension Crossmember

Enter your vehicle info to find more parts and verify fitment

  • Select Vehicle by VIN
  • Select Vehicle by Model
Select by VIN
Enter your VIN for the most accurate results.
Enter your VIN for the most accurate results.
or
Select by Model
-- Select Make --
-- Select Model --
-- Select Year --

3 Rear Crossmembers found

  • 2018 GMC Sierra Rear Crossmember - 20909404
    View related parts

    2018 GMC Sierra Crossmember Assembly, Rear Shock Absorber

    Part Number: 20909404
    • Other Name: CROSSMEMBER, Intermediate(Transmission Support Cross Member)
    • Position: Rear
    $55.67 MSRP: $83.23
    You Save: $27.56 (34%)
    Add to Cart
    More Info
    Fits the following 2018 GMC Sierra Submodels:
    • 3500 CREW CAB ONLY, 3500 REGULAR CAB, CREW CAB 1 TON 137.0, EXTENDED CREW CAB 1 TON 161.5, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel
    Less Info
  • 2018 GMC Sierra Rear Crossmember - 84339602
    View related parts

    2018 GMC Sierra Crossmember Assembly, Rear

    Part Number: 84339602
    • Position: Rear
    • Replaces: 20909393
    $130.97 MSRP: $196.69
    You Save: $65.72 (34%)
    Add to Cart
    More Info
    Fits the following 2018 GMC Sierra Submodels:
    • 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 2500 LONG BOX, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel
    Less Info
  • 2018 GMC Sierra Rear Crossmember - 84339539
    View related parts

    2018 GMC Sierra Crossmember Assembly, Rear

    Part Number: 84339539
    • Other Name: Crossmember
    • Position: Rear
    • Replaces: 20909405
    $61.85 MSRP: $92.47
    You Save: $30.62 (34%)
    Add to Cart
    More Info
    Fits the following 2018 GMC Sierra Submodels:
    • 3500 CREW CAB ONLY, 3500 REGULAR CAB, CREW CAB 1 TON 137.0, CREW CAB 1 TON CHASSIS 137.0, EXTENDED CREW CAB 1 TON 161.5, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L, 8 Cyl 6.6L Diesel
    Less Info