Did I Make a Mistake? Towing a 12,000 LB 5th Wheel with My GAS 2500HD (L8T)

I just picked up my new Brinkley Model Z 2810 fifth wheel! But moving from a 6,000 lb travel trailer to a 12,000+ lb fifth wheel brings up the ultimate question: Did I make a mistake sticking with a gas 3/4-ton truck? In this video, I’m taking you along for the 3+ hour drive home from Cookeville, TN, to see exactly how my 2024 GMC Sierra 2500HD with the 6.6L V8 L8T Gas engine handles this much weight. I am hitting 7% mountain grades, tracking the Allison 10-speed transmission live with a Kingbolen S608 scanner, and checking to see if that Borla S-Type exhaust gets annoying under a heavy load. 🔥 Massive shoutout to Adam West and the team at Cookeville RV! This is the only dealership I’ve ever returned to for a second purchase. If you want competitive pricing and to be treated right by a family-owned dealer, give them a call and tell them I sent you! 👇 Videos Mentioned: 20K Mileage Update: Does Engine Break-in Impact MPGs? -    • Does Engine Break-In Actually Improve MPG?...   6,000 LB Tow with Imagine XLS & MPG Test -    • I Tow with the 6.6L L8T Gas Engine in My 2...   Spreadsheet to Decide Gas vs. Diesel -    • I Created a Spreadsheet to Decide: Gas vs ...   Tour: Brinkley Model Z 2810 -    • 2026 Brinkley Model Z 2810 Tour: How They ...   Fuel Savings: Gas vs. Diesel -    • Gas vs Diesel HD Truck Fuel Cost Savings: ...   Maintenance: Gas vs. Diesel -    • Maintenance: Gas vs Diesel HD Truck Compar...   Resale Value: Gas vs. Diesel -    • Gas vs Diesel Resale: How I Lost $6,000 by...   👇 Gear I Used: Kingbolen S608 - https://amzn.to/4cgx3vd Use Code: S608APRIL (10% off) ⏱️ Video Chapters: 00:00 - The Big Reveal: 12K LB Brinkley Model Z 2810! 02:30 - Why I Bought from Cookeville RV Again 03:06 - Gas vs. Diesel C 04:15 - Initial Impressions 05:24 - 7% Climb 08:19 - Borla S-Type Exhaust 09:20 - Flat Terrain Sample 10:07 - Cummins Dually 6.7L Comparison 16:17 - 8% Descent 21:17 - MPG & Final Verdict 🚚 My Tow Rig Specs: Truck: 2024 GMC Sierra 2500HD Engine: 6.6L V8 Gas (L8T) Transmission: Allison 10-Speed Payload: 3,300 LBS Exhaust: Borla S-Type RV: Brinkley Model Z 2810 (12,000+ LBs Empty) Full Listing of Products in our Online Store https://adventure.rocks/store/ Disclaimer: Some links listed above are affiliate links. If you purchase products through these links, I may receive a small commission at no additional cost to you. As an Amazon Associate, I earn from qualifying purchases. #GMC2500HD #L8T #BrinkleyRV #RVing #Towing #GasVsDiesel #Sierra2500 #HeavyDuty