This page covers 2 recalls and EPA fuel economy for the 2020 GMC Sierra.
16–24 mpg combined
9.8–14.7 L/100km
Standard Pickup Trucks 4WD
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 9 tested variants for this model year.
The 2020 GMC Sierra has two recalls of equal seriousness: tires on certain vehicles can develop sidewall cracks or tread separation leading to sudden air loss, and brake caliper bolts can break and allow the caliper to detach. The tire issue affects vehicles built with specific Continental tires, where over-curing can cause the tire to fail without warning and result in loss of control. On the brake side, a detached caliper can reduce stopping power significantly or lock up against the wheel, extending stopping distances or interfering with the vehicle's ability to roll freely.
At a glance
What can fail
Certain Continental tires may have been cured too long during manufacturing, causing the sidewall to crack or the tread and belts to separate. This can lead to sudden air pressure loss and tire failure.
What the fix does
Dealers will inspect your tires and replace any with the specific DOT and mold numbers identified by Continental as affected.
We may earn a commission for purchases made through these links.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The bolts holding your front and/or rear brake calipers can break under load, causing the caliper to detach. This reduces braking power and may cause the caliper to interfere with wheel rotation.
What the fix does
GM will mail you instructions to have a dealer replace the brake caliper bolts.
Summarized — see the official notice for exact wording, dates, and contacts.
