Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number
GMC GUN075-3B gas furnace

GMC GUN075-3B gas furnace Parts

Here are the diagrams and repair parts for GMC GUN075-3B gas furnace, as well as links to manuals and error code tables, if available.

By Schematic
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for GUN075-3B Gas Furnace

  • Furnace Range Burner Orifice for GMC GUN075-3B - Part B1789342

    Gas train diagram

    Gas Orifice

    Part #B17893-42

    Replaced by #B1789342

    Info Icon
    Manufacturer substitution
    This part replaces B17893-42. Substitute parts can look different from the original.
    In Stock
    $32.30
    Minus Item
    Qty
    Plus Item
  • 5 Mfd 440/37 for GMC GUN075-3B - Part TRCF5

    Misc. electrical/hardware diagram

    Capacitor 5/

    Part #B9456-50

    Replaced by #TRCF5

    Info Icon
    Manufacturer substitution
    This part replaces B9456-50. Substitute parts can look different from the original.
    In Stock
    $29.15
    Minus Item
    Qty
    Plus Item
  • Transformer for GMC GUN075-3B - Part B11416-00

    Misc. electrical/hardware diagram

    Transformer

    Part #B11416-00

    The manufacturer no longer makes this part, and there's no substitute part

  • Heat Exchange for GMC GUN075-3B - Part 18212-30S

    Heat exchanger assembly diagram

    Heat Exchange

    Part #18212-30S

    The manufacturer no longer makes this part, and there's no substitute part

  • 1/6-1/2 Hp M for GMC GUN075-3B - Part 45460

    Blower assembly diagram

    Motor

    Part #B13400-09

    Replaced by #45460

    Info Icon
    Manufacturer substitution
    This part replaces B13400-09. Substitute parts can look different from the original.
    In Stock
    $280.82
    Minus Item
    Qty
    Plus Item
  • Comb Box Frt for GMC GUN075-3B - Part 18820-15

    Heat exchanger assembly diagram

    Comb Box Frt

    Part #18820-15

    The manufacturer no longer makes this part, and there's no substitute part

  • Box,combusti for GMC GUN075-3B - Part 18820-02

    Heat exchanger assembly diagram

    Box,combusti

    Part #18820-02

    The manufacturer no longer makes this part, and there's no substitute part

  • Rubber Coupl for GMC GUN075-3B - Part B18104-00

    Misc. electrical/hardware diagram

    Rubber Coupl

    Part #B18104-00

    The manufacturer no longer makes this part, and there's no substitute part

  • Secondary He for GMC GUN075-3B - Part B18646-02

    Heat exchanger assembly diagram

    Secondary He

    Part #B18646-02

    The manufacturer no longer makes this part, and there's no substitute part

  • Manifold, 2 for GMC GUN075-3B - Part B18264-12

    Gas train diagram

    Manifold, 2

    Part #B18264-12

    The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower front deck tray

How to replace a lawn mower front deck tray

Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…

Repair time and Difficulty

 60 minutes or less
How to replace a lawn mower transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…

Repair time and Difficulty

 60 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair time and Difficulty

 45 minutes or less

Effective articles & videos to help repair your furnaces

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

How to get your furnace ready for winter

How to get your furnace ready for winter

Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape.…

2023 HVAC regulation changes and how they may affect you

2023 HVAC regulation changes and how they may affect you

Find out how new DOE standards going into effect in 2023 can affect you and what you need to do.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Parts & More

Air Compressor
Canister Vacuum
Dryer
Electric Wall Oven
Furnace
Gas Range
Gas Walk-Behind Mower
Laundry Center
Lawn & Garden Engine
Power Drill
Side-By-Side Refrigerator
Top-Mount Refrigerator
Wall Oven/Microwave Combo
Water Heater
Window Air Conditioner