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What Does AT4 Mean On GMC Trucks? Here's What The Package Includes
When you want to go off-road, uptown-style, GMC supports that vision ... take on off-roading -- the HD AT4 -- has an MSRP that starts at $70,100. Both the 2500 and 3500 Sierra Heavy Duty trucks ...
GMC Sierra EV Adds AT4 and Elevation Trims, Drops Base Price by $25,000
The GMC Sierra EV has always been an expensive pickup. The new entry-level version of the Sierra EV clocks in at under ...