Towing a Boat to Lewisville Lake: Which GMC Sierra Should You Choose?

Launch at Lewisville Lake this season and the Sierra 1500 handles the vast majority of recreational boats without breaking a sweat. The right engine and a quick payload calculation are what make that true for your specific rig. A common instinct is to fixate on the max towing number on the window sticker, and that’s the wrong place to start. Boat weight plus trailer plus four passengers plus a cooler is the number that matters, and that math tells you whether a 2026 Sierra 1500 gets the job done or whether you need to step up.

Straight talk, the 1500 is the better everyday truck for most recreational rigs on this lake, since Plano to the water is a 30-minute haul up I-35E and TX-121 with a loaded trailer in August and you want something you’re comfortable driving 50 weeks a year, not just the 15 times you hit the lake. The 2500 HD is the right answer for a specific set of boats, and we’ll get to exactly which ones.

What’s the Plan at a Glance?

Tower Bay Is the Ramp Most North Texas Boaters Skip (and Shouldn’t)

Tower Bay earns a spot on your short list because it launches into water that stays protected from open-lake chop, though you’ll want to sort out its credit-card-only day-use fee before you pull in with a trailer behind you on a busy morning. The launch sits on the western arm of the lake under I-35E, operated by the City of Lewisville Parks and Recreation on Army Corps of Engineers property. The launch area is protected from the open-lake chop that can complicate loading at more exposed ramps on a breezy North Texas afternoon. There’s a courtesy dock right next to the ramp. That helps a lot when you’re holding the boat steady while a family member parks the truck and walks back.

The Sierra 2500 HD fits the ramp without trouble (it’s a standard concrete lane), but the advantage here isn’t truck clearance at all. A protected launch means you’re not fighting wake while you load a 24-foot wakeboard boat back onto the trailer after a long day. Calmer water is the point.

Plan around one genuine tradeoff at Tower Bay. The day-use fee is credit card only at a kiosk, no cash and no exceptions. Get that sorted before you pull in with 29 feet of truck and trailer.

Getting There from Plano: The I-35E Run in August Heat

From our lot on the Dallas Parkway, you’re looking at roughly 30 minutes to the Lewisville lake access points via the President George Bush Turnpike connecting to I-35E, and while that’s a short drive on paper, doing it in August with a loaded boat trailer asks real work of the truck. But that 30-minute run in August, with a 6,000-pound boat trailer behind you and North Texas summer heat (the kind that regularly sits above 100 degrees from June through September), puts a genuine load on a truck’s cooling system before you ever see the ramp.

The Sierra 1500’s available ProGrade Trailering System includes trailer sway control and an integrated trailer brake controller. You’re not thinking about those features on a cool April morning. On a packed Saturday in August, with traffic backing up near the TX-121 junction, they’re the reason you stay calm.

Little Elm Park, on the lake’s south end via FM 423, is the other smart option from our direction. That ramp sits higher than most of the other launch points around the lake, so it stays accessible when water levels dip or spike (something that genuinely happens on a Corps-managed reservoir). If Lake Park posts a closure, Little Elm is your backup.

Which Sierra Actually Fits Your Boat

Most Lewisville rigs fit the Sierra 1500 comfortably, but a heavy boat plus a full family can push you toward the 2500 HD, so the answer really comes down to your loaded weight rather than the sticker’s headline number. Get this part right and you’ll save yourself a bad day at the ramp. The 2026 Sierra 1500 is rated to tow up to 13,300 pounds when properly equipped, per GMC’s published trailering specifications. Most Lewisville Lake boats land well inside that. A 22-foot bowrider with trailer runs around 5,000 to 6,500 pounds wet. A typical wakeboard boat in that 20-to-23-foot range, loaded with fuel and gear, comes in between 5,500 and 8,000 pounds. The 5.3L EcoTec3 V8 (rated at 355 horsepower and 383 lb-ft of torque, with up to 11,200 pounds of towing capacity) handles those boats with headroom to spare.

Payload deserves more of your attention than towing capacity here. Tongue weight (typically 10 to 15 percent of your loaded trailer weight) counts against your payload, not just your towing rating. Add two adults in the cab, kids in the back seat, a cooler, life jackets, and ropes, and a 1500’s payload gets meaningfully tighter than the sticker suggests. The Sierra 2500 HD changes that equation. With up to 3,863 pounds of payload and the Duramax 6.6L diesel producing 975 lb-ft of torque per GMC’s published specs, it never feels pressed. It doesn’t feel pressed hauling out of a wet ramp in Texas summer heat, and it doesn’t on the long pull back down I-35E. Go with the 2500 HD if your boat-and-trailer combo runs above 10,000 pounds, or if you routinely carry a full family plus gear alongside a heavy rig.

From experience, we’d flag one engine note. The 2.7L TurboMax’s 430 lb-ft of torque arrives low in the rev range, which makes it feel more capable than its 9,400-pound max rating suggests for short-haul lake trips. It pulls smoothly around town and up the ramp, no drama. But if you’re running anything over 8,000 pounds regularly, or if you’re already close to the payload ceiling before you add passengers, the 5.3L is the more comfortable choice. Our finance team can help you work through the configuration that keeps capability and budget aligned.

Both trucks get the ProGrade Trailering System with up to 15 camera views including a hitch-guidance view that makes backing to a ball on a crowded ramp significantly less stressful. We’d call that underrated. Reversing a boat trailer at Lake Park on a busy Saturday is where that camera pays for itself.

By the Ewing Buick GMC Team | August 2026