New & Used Commercial Truck Dealer in Texas

Wiesner Commercial Truck Headquarters in Houston, TX is your best choice for GMC or Isuzu truck sales, parts and services. Whether you are interested in a new or used light, medium, or heavy-duty commercial truck, or need Parts, Service, or Collision repairs, our experienced staff is ready to help you find the perfect commercial truck for your needs.

John Wiesner built his business on a foundation of experience and customer satisfaction. You will find knowledgeable, professional people ready to work with you in a straight-forward, courteous manner. Our primary concern is your satisfaction -- At Wiesner Trucks, we want your business not just today, but tomorrow as well.

Please feel free to call or send us an email - see the contact us page for our contact information.

GMC Commercial Trucks:   "Professional Grade" Work Trucks

  • Canyon Pickups -- Extended or Crew Cab -- All New 2015 Models
  • Sierra 1500 Pickups -- Regular, Double-Cab, or Crew Cab   
  • Sierra 2500 HD Pickups -- Regular, Double-Cab, or Crew Cab
  • Sierra 2500 HD Cab & Chassis -- Regular, Double-Cab, or Crew Cab 
  • Sierra 3500 HD Pickups -- Regular, Double-Cab, or Crew Cab -- Single or Dual Rear Wheels 
  • Sierra 3500 HD Cab & Chassis -- Regular, Double-Cab, or Crew Cab -- Single or Dual Rear Wheels -- Variety of sizes for the Work Body of your choice     
  • Savana 2500 Cargo Van -- Std or Extended Length
  • Savana 3500 Cargo Van -- Std or Extended Length
  • Savana 3500/4500 Cut-Away Chassis -- Variety of sizes for the Box or Utility Body of your choice

GMC offers a wide selection of Gasoline Engines from the Best-In-Class fuel economy of the all-new 4.3 Ltr/280HP V6 or the powerful, but efficient 5.3 Ltr V8 on the Sierra 1500 Pickups, and V6 or V8 on the Savana Cargo Vans. 

The all-new 2015 Canyon Extended-Cab offers a choice of the economical, but powerful 2.5 Ltr Inline 4-Cylinder or the highly-praised 3.6 Ltr V6, and now the affordable, dependable 2.8 Ltr Turbo-Diesel.

On the Sierra 2500 & 3500 HD Series and the Savana 3500/4500 Cutaway, you have a choice of the powerful Vortec Heavy-Duty 6.0 Ltr V8 Gas Engine or the mighty 6.6 Ltr Dura-Max Diesel on Sierra HD's and the new 2.8 Ltr Turbo_diesel on Savana.

GMC also offers CNG powered trucks & vans in either dedicated or bi-fuel systems on selected models. An OEM-ordered installation with factory warranty at an attractive price...we can help you do the math to see if it makes sense for you!

GMC trucks are rugged and dependable. You don't see other manufacturers on TV comparing their trucks to ours. GMC is truly Professional Grade...and Wiesner has the best selection anywhere !   

Isuzu Commercial Trucks:   " #1 Cab-Over Truck...33 Years Running" 

  • NPR -- 12,000# GVWR -- Gas or (2) Diesels  
  • NPR-HD -- 14,500# GVWR -- Gas or Diesel -- Regular or Crew Cab
  • NPR-XD -- 16,000# GVWR -- Diesel -- Regular or Crew Cab -- New for 2015 Model    
  • NQR -- 17,950# GVWR -- Diesel -- Regular or Crew Cab 
  • NRR -- 19,500# GVWR -- Diesel
  • REACH -- 12,000# GVWR -- Walk-In Commercial Vehicle -- Eco-Max Diesel

Our Isuzu line can be summed-up by the words "Clean, Powerful, Efficient and Versatile". The aerodynamic Low Cab Forward (aka Tilt-Cab or Cab-Over) design promotes fuel economy, enhanced visibility and enables a tight turning radius, saving time and effort at loading and delivery sites.

Plus Isuzu is the only Cab-Over available that offers both Gasoline and Diesel Engine option. But that's only part of the story. Our Gas engine is a powerful, dependable 6.0 Ltr V8 that offers significantly lower purchase price. Depending on how you use the truck, a Gas engine may be the right move. We can show you how to "do the math" to see if it makes sense for your needs.

If you're interested in Alternative Fuels...Isuzu offers optional fully-prepped engines for CNG/LPG upfit or turn-key installation of CNG in either dedicated or bi-fuel systems.

As for Diesels, Isuzu offers the 3.0 Ltr Eco-Max in the NPR (with 20% better fuel economy) and the legendary 5.2 Ltr Turbo-Diesel in all models. Both are clean-running and efficient with plenty of power for any trucking job.  All engines are teamed with a heavy-duty 6-Speed Automatic Transmission renowned for durability and efficiency.

For versatility, Isuzu offers two Cab Styles -- Regular Cab w/ 3-Pass Seating and Crew Cab w/ 7-Pass Seating (avail NPR, NPR-HD, NPR-XD & NQR only)-- plus a wide array of wheelbases, frame lengths, and weight-class categories to accommodate your body and equipment requirements...up to 24ft in length and maximum payload of 12,785 lbs.  

The REACH is an all-new Walk-In Commercial Vehicle available in (2) sizes -- 12ft & 14ft Cargo compartments. Powered by the fuel-stretching 3.0 Ltr Eco-Max Diesel, it is available with a wide variety of cargo-handling features and options so it can be customized to your needs. Work Truck magazine was so impressed by the REACH, they named it the Medium-Duty Truck of the Year.

Where do our customers come from? All over Texas and beyond, but typically from the following communities: Houston, Alvin, Angleton, Atascocita, Baytown, Beaumont, Bellaire, Brenham, Bryan, Channelview, Clear Lake, Cleveland, College Station, Conroe, Crosby, Cypress, Dayton, Deer Park, Dickinson, El Campo, Freeport, Friendswood, Galveston, Hearne, Heights, Hempstead, Humble, Huntsville, Katy, Kingwood, Lake Jackson, LaPorte, League City, Liberty, Livingston, Lufkin, Magnolia, Missouri City, Navasota, Nacogdoches, Pasadena, Pearland, Richmond, Rosenberg, Seabrook, Spring, Stafford, Sugarland, Texas City, The Woodlands, Tomball, West University & Wharton.


Wiesner Trucks

1508 I-45 N
Directions Conroe, TX 77301

  • Sales: (936) 538-9350
  • Service: 936-523-6936
  • Parts: (936) 523-6333


  • Monday 8:30AM - 6:00PM
  • Tuesday 8:30AM - 6:00PM
  • Wednesday 8:30AM - 6:00PM
  • Thursday 8:30AM - 6:00PM
  • Friday 8:30AM - 6:00PM
  • Saturday Closed
  • Sunday Closed