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    Kloc Fabrication

    • Automotive Products
      • 88-98 GMT400 (OBS)
        • Shop All 88-98 GMT400 Products
        • Transmission Coolers & Line Kits
        • Coolant Reservoirs & Surge Tanks
        • Washer Fluid Reservoirs
        • Crankcase Breather Filters & Catch Cans
        • Engine Oil Cooler Accessories
      • Squarebody C/K
      • Ford Mustang
      • Fittings & Caps
    • Bargain Bin
    • Custom Reservoirs
    • Order Processing & Shipment
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    Aftermarket solutions for all 1988-1998 GMT400 Vehicles.

    Featured products

    • 1988-1998 GMT400 (C/K1500) Notched Hood Latch Bracket

      1988-1998 GMT400 (C/K1500) Notched Hood Latch Bracket

      1988-1998 GMT400 (C/K1500) Notched Hood Latch Bracket

      54 reviews

      4.98 / 5.0

      (54) 54 total reviews

      Regular price From $165.75 USD
      Regular price Sale price From $165.75 USD
      Unit price /  per 
    • Tru-Cool 40K Installation Bundle (For 1988-1998 GMT400 C/K)

      Tru-Cool 40K Installation Bundle (For 1988-1998 GMT400 C/K)

      Tru-Cool 40K Installation Bundle (For 1988-1998 GMT400 C/K)

      27 reviews

      5.0 / 5.0

      (27) 27 total reviews

      Regular price From $495.00 USD
      Regular price Sale price From $495.00 USD
      Unit price /  per 
    • Tru-Cool 40K Line Kits

      Tru-Cool 40K Line Kits

      Tru-Cool 40K Line Kits

      20 reviews

      4.9 / 5.0

      (20) 20 total reviews

      Regular price From $165.00 USD
      Regular price Sale price From $165.00 USD
      Unit price /  per 
    • Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)

      Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)

      Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)

      22 reviews

      4.64 / 5.0

      (22) 22 total reviews

      Regular price $150.00 USD
      Regular price Sale price $150.00 USD
      Unit price /  per 
    • 1988-1998 GMT400 (C/K1500) Coolant & Breather Filter Combo Tank

      1988-1998 GMT400 (C/K1500) Coolant & Breather Filter Combo Tank

      1988-1998 GMT400 (C/K1500) Coolant & Breather Filter Combo Tank

      7 reviews

      5.0 / 5.0

      (7) 7 total reviews

      Regular price From $450.00 USD
      Regular price Sale price From $450.00 USD
      Unit price /  per 
    • 1988-1998 GMT400 (C/K1500) Pressurized Surge Tank

      1988-1998 GMT400 (C/K1500) Pressurized Surge Tank

      1988-1998 GMT400 (C/K1500) Pressurized Surge Tank

      16 reviews

      5.0 / 5.0

      (16) 16 total reviews

      Regular price From $280.00 USD
      Regular price Sale price From $280.00 USD
      Unit price /  per 
    • 1988-1998 GMT400 (C/K) Coolant Overflow Reservoir

      1988-1998 GMT400 (C/K) Coolant Overflow Reservoir

      1988-1998 GMT400 (C/K) Coolant Overflow Reservoir

      23 reviews

      5.0 / 5.0

      (23) 23 total reviews

      Regular price From $250.00 USD
      Regular price Sale price From $250.00 USD
      Unit price /  per 
    • 1993-1998 GMT400 (C/K) 6.5L Diesel Coolant Reservoir

      1993-1998 GMT400 (C/K) 6.5L Diesel Coolant Reservoir

      1993-1998 GMT400 (C/K) 6.5L Diesel Coolant Reservoir

      11 reviews

      5.0 / 5.0

      (11) 11 total reviews

      Regular price From $315.00 USD
      Regular price Sale price From $315.00 USD
      Unit price /  per 
    • 1988-1994 GMT400 (C/K1500) Washer Fluid Reservoir

      1988-1994 GMT400 (C/K1500) Washer Fluid Reservoir

      1988-1994 GMT400 (C/K1500) Washer Fluid Reservoir

      19 reviews

      5.0 / 5.0

      (19) 19 total reviews

      Regular price From $215.00 USD
      Regular price Sale price From $215.00 USD
      Unit price /  per 
    • 1995 GMT400 (C/K1500) Washer Fluid Reservoir

      1995 GMT400 (C/K1500) Washer Fluid Reservoir

      1995 GMT400 (C/K1500) Washer Fluid Reservoir

      1 review

      5.0 / 5.0

      (1) 1 total reviews

      Regular price From $255.00 USD
      Regular price Sale price From $255.00 USD
      Unit price /  per 
    View all

    Let customers speak for us

    from 225 reviews
    91 c1509 overflow tank

    Kloc fabrication did an amazing job on fabricating this overflow tank for my 1991 Chevy C 1500. On a scale from 1 to 10 they’re a 10. Spencer was very friendly and knowledgeable. They also installed a – six fitting on the tank for me.

    Jeff Neuman
    10/11/2026
    1988-1998 GMT400 (C/K) Coolant Overflow Reservoir
    excellent service and product

    Fast shipping and product came fully protected and also came with attachments for installation. I especially appreciate the mote that came with the product.

    Jorge rosales
    10/11/2026
    Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)
    Cooler and lines

    Got a tru cool 40k and a set of lines for my 6l80 and it showed up fast and everything looks great

    Joe G
    10/05/2026
    Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)
    Coolant Reservoir

    Tank came in when he said it would and the fit and finish was amazing . Fits perfectly with the tubs

    Bryan gaston
    09/28/2026
    1988-1998 GMT400 (C/K) Coolant Reservoir for SLOSH TUBZ
    Black billet overflow tank 96 2dr tahoe

    This masterpiece is a work of art!!
    Sight glass in front,vented cap and even added arp 12pt 771-1002 stainless steel bolts..powdercoated matte black 6an fitting with black braided hose!! Its a show piece!! Fast shipping,replys quickly and the best part its family owned right here in the USA!!!😎👍🏻

    Dale Hall
    09/27/2026
    1988-1998 GMT400 (C/K) Coolant Overflow Reservoir
    Trustworthy parts and and service!

    Communication was excellent. Parts are quality. I had a cooler that was damaged in shipping and it was replaced immediately. Quick response and no stress. Packaging was nice and neat on the first shipment as well as the second. Attention to detail for sure. My parts came with quality inspection dates prior to shipping. Quality service.

    Vic
    09/21/2026
    Tru-Cool MAX 40,000 GVW (LPD47391 Replacement)
    Perfect

    Beautiful piece . Hate to hide it under the hood .

    Steve Gerdan
    09/14/2026
    1988-1998 GMT400 (C/K1500) Pressurized Surge Tank
    GMT400 Windshield Washer Reservoir

    Very happy and satisfied with the quality of the reservoir I received
    Paint quality and welds are definitely done right . I liked it so much I had to order the coolant reservoir to match it . Definitely would recommend there products to anybody out there .

    Jose Maldonado
    09/14/2026
    1995 GMT400 (C/K1500) Washer Fluid Reservoir
    Very Professional

    Called in to see if parts were available and they had them at my door step in 3 days. 5 outta 5

    Cody Brazile
    09/11/2026
    1988-1998 GMT400 (C/K) Coolant Overflow Reservoir

    Awesome product works perfectly

    Mason
    09/09/2026
    GMT400/5.7L 350 Oil Cooler AN Line Kit
    Perfect product

    I ordered the washer and coolant reservoir. Both came flawless and beautiful. The communication was excellent. Five stars!

    Dale Cole
    09/06/2026
    1988-1994 GMT400 (C/K1500) Washer Fluid Reservoir
    Custom made OBS surge tank

    KLOC FABRICATION was amazing to work with. Superior FABRICATION and welding. Product looks amazing and fit like a glove.

    Patrick Harrold
    09/03/2026
    1988-1998 GMT400 (C/K1500) Pressurized Surge Tank
    Perfect, drop-in fit.

    Hands down the best customer service of any vendor for anything I've ever bought for my truck. I bought the regular GMT400 pressurized reservoir. It sat on the shelf while I did other things on my truck. I saw that they had a 6.5TD specific tank for sale and wrote them for an exchange--they didn't give one bit of pushback. I paid the difference (very little) and it was shipped to me. The reservoir itself is beautiful but more importantly, functional. The low coolant sensor is a must have on these trucks. They even customized mine to fit my lower radiator hose without a reducer.

    Alejandro Macias
    09/02/2026
    1993-1998 GMT400 (C/K) 6.5L Diesel Coolant Reservoir
    OBS transcooler mount

    I bought the OBS transcooler for my 1993 GMC K1500 and temps dropped 30 degrees on my 4l60e... Amazing

    Pedro Gutierrez
    09/01/2026
    Tru-Cool 40K Installation Bundle (For 1988-1998 GMT400 C/K)

    Very good product looks great on truck

    chad
    08/27/2026
    1988-1994 GMT400 (C/K1500) Washer Fluid Reservoir

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