Door Sills
Rear Pickup Box Cross Sill with Reinforcements
GM
23355803
6.6 ft box. 8 ft box without dual rear wheels. 5.8 ft box. Helps secure and strengthen truck bed floor
This GM Genuine Part is...
$237.31
MSRP $358.13
Save $120.82
33.7% Off 
Rear Pickup Box Cross Sill with Reinforcements
GM
23355804
8 ft box, with dual rear wheels. Helps secure and strengthen truck bed floor
This GM Genuine Part is designed, engineered, and tested...
$191.25
MSRP $288.61
Save $97.36
33.7% Off 
Driver Side Number 1 Underbody Cross Sill
GM
52015797
Extended cab, inner. Crew cab. inner. Helps support and strengthen your vehicle's floor panel
This GM Genuine Part is designed,...
$25.54
MSRP $38.55
Save $13.01
33.7% Off 
Passenger Side Number 1 Underbody Cross Sill
GM
52015798
Extended cab, inner. Crew cab. inner. Helps support and strengthen your vehicle's floor panel
This GM Genuine Part is designed,...
$23.90
MSRP $36.07
Save $12.17
33.7% Off 
Passenger Side Number 1 Underbody Cross Sill
GM
22992440
Crew cab. Double cab. Regular cab. Helps support and strengthen your vehicle's floor panel
This GM Genuine Part is designed,...
$46.05
MSRP $69.49
Save $23.44
33.7% Off 
Jet Black Rear Compartment Sill Trim Plate
GM
42340990
Trunk compartment. Helps secure the vehicle's trunk storage area while helping to protect the trunk's entry from damage during loading...
$37.79
MSRP $57.02
Save $19.23
33.7% Off 
Number 2 Underbody Cross Sill with Extensions
GM
22990749
Extended cab. Helps support and strengthen your vehicle's floor panel
This GM Genuine Part is designed, engineered, and tested to...
$57.90
MSRP $87.38
Save $29.48
33.7% Off 
Jet Black Passenger Side Liftgate Sill Plate
GM
23382373
Black. Enhances appearance of your vehicle's liftgate
This GM Genuine Part is designed, engineered, and tested to rigorous standards and...
$9.96
MSRP $15.02
Save $5.06
33.7% Off 
Driver Side Underbody Number 1 Cross Sill
GM
22958799
Crew cab. Double cab. Regular cab. Helps support and strengthen your vehicle's floor panel
This GM Genuine Part is designed,...
$62.69
MSRP $94.60
Save $31.91
33.7% Off 
Pickup Box Platform Number 4 Cross Sill
GM
20832572
Regular & extended cab. Helps secure and strengthen truck bed floor
This GM Genuine Part is designed, engineered, and tested to...
$20.12
MSRP $30.36
Save $10.24
33.7% Off 
Very Dark Pewter Rear Compartment Sill Plate
GM
96936801
Sedan, trunk compartment, pewter. Helps enhance the appearance of your vehicle's liftgate
This GM Genuine Part is designed, engineered,...
$6.05
MSRP $9.13
Save $3.08
33.7% Off 
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