ECOTRIC Cab Corner Panels for 1999–2007 Chevy Silverado & GMC Sierra — Steel, Electrophoretic Finish

ECOTRIC cab corners are direct-fit steel replacement panels for restoring the lower rear corners of 4-door extended-cab 1999–2007 Chevy Silverado and GMC Sierra trucks.

If your truck’s cab corners are rusted, dented, or otherwise damaged, these left and right replacement panels let you rebuild the underside of the cabin quickly and affordably. Made from durable steel with an electrophoretic surface finish, they match the original mounting points for a straightforward swap and help protect the body from further damage caused by impacts, road debris, and weather exposure.

Which models and years do these cab corners fit?

These replacement panels are engineered for 4-door extended cab models of Chevy Silverado and GMC Sierra across multiple model years. They replace OE part numbers 0856-115 and 0856-116 and fit both light-duty and heavy-duty variations where listed.

• 1999–2006 Chevy Silverado/GMC Sierra 1500 (4-door extended cab)
• 2000–2004 Chevy Silverado/GMC Sierra 2500 (4-door extended cab)
• 2001–2006 Chevy Silverado/GMC Sierra 2500 HD and 3500 (4-door extended cab)
• 2007 Chevy Silverado/GMC Sierra 1500, 2500 HD, 3500 Classic (4-door extended cab)

How easy is installation and what’s included?

Installation is designed to be a straightforward swap for the specified 4-door extended cab trucks and uses the factory mounting locations. The kit includes the left and right cab corner panels; mounting hardware is not included, and no complicated trimming is required in most cases.

• Package contains 2 cab corners: left and right
• Direct replacement for OE part numbers 0856-115, 0856-116
• Typically installs without drilling or modifications
• Mounting hardware and paint not included

What materials and finish are used, and how durable are they?

ECOTRIC cab corners are stamped from heavy-gauge steel to provide structural strength where the cabin meets the rear body. An electrophoretic coating improves corrosion resistance and helps the panels withstand everyday wear and environmental exposure.

• Durable steel construction for strength and longevity
• Electrophoretic surface finish for improved rust resistance
• Paint-ready surface—prime and paint to match vehicle color
• Designed to withstand road debris and light impacts

What damage do these panels address, and when should I replace them?

Cab corners commonly rust or sustain dents from road salts, rocks, and minor collisions. Replacing them restores the appearance, prevents further body deterioration, and preserves the structural interface between the cab and bed.

• Replaces rusted-through or dented lower rear cab corners
• Stops rust from spreading into adjacent sheet metal
• Restores factory fit and exterior lines of the truck
• Recommended when visible corrosion or structural damage is present

Who is this for: These ECOTRIC cab corners are intended for owners and mechanics restoring 4-door extended-cab Chevy Silverado or GMC Sierra trucks from 1999 through 2007 who need a cost-effective, direct-fit steel replacement. They suit restoration projects, collision repairs, and preventative maintenance when the original corners show rust or physical damage. For best results, have panels primed and painted to match your truck and use appropriate mounting hardware during installation.