2021 GMC Sierra 1500 SLT
$3,914 less than this car
- 83,545 mi
- 4WD
- Automatic
- Gasoline
- Truck
Legacy GMC · Slidell, LA · 0 mi away
71,828 miles · truck

Legacy Buick GMC has a wide selection of exceptional pre-owned vehicles to choose from, including this 2021 GMC Sierra 1500. Today's luxury vehicle is not just about opulence. It's about a perfect balance of performance, comfort and attention to detail. This 2021 GMC Sierra 1500 SLT is the perfect example of the modern luxury. No matter the terrain or weather, you'll drive at ease in this 4WD-equipped vehicle. With exceptional safety features and superb handling, this 4WD was engineered with excellence in mind. A GMC with as few miles as this one is a rare find. This Sierra 1500 SLT was gently driven and it shows. You've found the one you've been looking for. Your dream car.
Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.
In the typical middle range · 29% of 7 similar listings ask more than this car.
How we calculate market value: comparable cars for sale now plus their last listed prices.
Price tracked by AutosXchange since Nov 6, 2026. No price change at this dealership since Nov 6 ($37,888).0 price changes at this dealership: $37,888 → $37,888.
Market activity: Legacy GMC cut prices on 10 2026 GMC Sierra 1500 by an average of $1,500
AutosXchange Intel Hub: Price changes for this model in Louisiana · This model in the Intel Hub · Market movers in Louisiana
Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 11); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.
Same 2021 Sierra 1500 SLT · used · any miles · within 100 miles of Slidell, Louisiana. All 7 comparable cars for sale, nearest first.
$3,914 less than this car
Legacy GMC · Slidell, LA · 0 mi away
$3,893 less than this car
Legacy GMC · Slidell, LA · 0 mi away
$1,900 less than this car
Legacy GMC · Slidell, LA · 0 mi away
$3,893 less than this car
Legacy GMC · Slidell, LA · 0 mi away
$15,800 more than this car
Legacy GMC · Slidell, LA · 0 mi away
$465 more than this car
Ross Downing GMC of Gonzales · Gonzales, LA · 73 mi away
$9,953 less than this car
Royal Buick GMC · Baton Rouge, LA · 80 mi away
2021 GMC Sierra 1500 SLT83,545 miles · Legacy GMC · Slidell, LA · 0 mi away$33,974$3,914 less than this car
2021 GMC Sierra 1500 SLT78,217 miles · Legacy GMC · Slidell, LA · 0 mi away$33,995$3,893 less than this car
2021 GMC Sierra 1500 SLT69,904 miles · Legacy GMC · Slidell, LA · 0 mi away$35,988$1,900 less than this car
2021 GMC Sierra 1500 SLT103,322 miles · Legacy GMC · Slidell, LA · 0 mi away$33,995$3,893 less than this car
2021 GMC Sierra 1500 SLT18,656 miles · Legacy GMC · Slidell, LA · 0 mi away$53,688$15,800 more than this car
2021 GMC Sierra 1500 SLT48,655 miles · Ross Downing GMC of Gonzales · Gonzales, LA · 73 mi away$38,353$465 more than this car
2021 GMC Sierra 1500 SLT103,202 miles · Royal Buick GMC · Baton Rouge, LA · 80 mi away$27,935$9,953 less than this carAll years and trims. Nearest first.
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
Legacy GMC · Slidell, LA · 0 mi away
2021 GMC Sierra 1500 SLT106,153 miles · Legacy GMC · Slidell, LA · 0 mi away$29,888
2021 GMC Sierra 1500 SLT75,984 miles · Legacy GMC · Slidell, LA · 0 mi away$31,988
2021 GMC Sierra 1500 AT490,326 miles · Legacy GMC · Slidell, LA · 0 mi away$33,988
2021 GMC Sierra 1500 SLT26,620 miles · Legacy GMC · Slidell, LA · 0 mi away$36,988
2022 GMC Sierra 1500 Limited SLT97,437 miles · Legacy GMC · Slidell, LA · 0 mi away$32,988
2020 GMC Sierra 1500 AT4105,252 miles · Legacy GMC · Slidell, LA · 0 mi away$34,988
2022 GMC Sierra 2500 HD AT4129,469 miles · Legacy GMC · Slidell, LA · 0 mi away$49,988
2023 GMC Sierra 1500 SLT82,926 miles · Legacy GMC · Slidell, LA · 0 mi away$39,988