Year & trim-specific price guide

Used 2018 GMC Sierra 1500 Quarter Panel — 6' 6" box, LH prices

Trim-specific pricing for the 6' 6" box, LH variant of the 2018 GMC Sierra 1500 quarter panel, built from 44 real salvage yard listings with condition grade detail.

2018 GMC Sierra 1500 · 6' 6" box, LH

$508

median asking price

44 priced listings · $85–$750

Price summary

A used 2018 GMC Sierra 1500 quarter panel (6' 6" box, LH) costs $85 to $750, with a median asking price of $508. Based on 44 priced salvage yard listings across the US, updated Sep 8, 2026. Prices exclude shipping, core charges, and installation.

2018 GMC Sierra 1500 quarter panel — 6' 6" box, LH price snapshot

USD
Low
$85
Average
$496
High
$750
44 priced listings used · last updated Sep 8, 2026· How we price·

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Reporting price for 2018 GMC Sierra 1500 Quarter Panel (6' 6" box, LH)

Reason

Condition comparison

Price by part grade

Grade AClean / low wearUpdating
Grade BStandard usedUpdating
Grade CVisible wearUpdating
Grade XUngraded$85–$75044 listings

Trim-specific context

How does the 6' 6" box, LH compare?

This pricing covers the 6' 6" box, LH variant of the 2018 GMC Sierra 1500 quarter panel, based on 44 priced listings. Its $508 median is 2% above the 2018 GMC Sierra 1500 quarter panel overall median of $500.

There are 5 other quarter panel variants available for the 2018 GMC Sierra 1500.

Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.

Same trim, other years

6' 6" box, LH in other model years

All years
202330 listings$667$50 – $787201723 listings$500$25 – $800201545 listings$554$65 – $975

Same year, other trims

What other 2018 GMC Sierra 1500 quarter panel variants are available?

5' 9" box, LH

48 listings$585$251 – $700

8' box, LH

47 listings$425$250 – $830

8' box, RH

43 listings$470$50 – $700

6' 6" box, RH

42 listings$442$200 – $750

5' 9" box, RH

39 listings$486$286 – $822

Back to full guide

2018 GMC Sierra 1500 quarter panel — all trims

View 2018 guide

Common questions

2018 GMC Sierra 1500 quarter panel (6' 6" box, LH) FAQ

How much is a used 2018 GMC Sierra 1500 quarter panel (6' 6" box, LH)?

Based on 44 priced salvage-yard listings, a used 2018 GMC Sierra 1500 quarter panel in the 6' 6" box, LH variant lists between $85 and $750, with a median asking price of $508.

Which years use the 6' 6" box, LH quarter panel?

The 6' 6" box, LH variant appears in model years 2015, 2017, 2018, 2023. Prices and availability may differ by year.