10.0

really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
0 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2020 GMC Sierra 3500 body / paint problems

body / paint problem

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2020 GMC Sierra 3500 Owner Comments

problem #2

Dec 142022

Sierra 3500

  • miles

A D V E R T I S E M E N T S

Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the cost of a whole new window to be put in and reimbursed. GM bulletin # is 18-NA-383

- Ramona, CA, USA

problem #1

Nov 132022

Sierra 3500

  • miles
Plugged in engine block heater and the car erupted in flames. Total loss.

- Lawton, OK, USA

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