42+ 1985 GMC K1500 Exhaust Systems Sierra Classic Parts

Sierra Classic · Exhaust Systems (42 products)

Exact-fit parts for the 1985 GMC K1500 Sierra Classic.

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

Dorman

Part # 03084

Fits with Conditions

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

$10.29

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

Dorman

Part # 03080

Fits with Conditions

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

$9.53

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

Dorman

Part # 03110

Fits with Conditions

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

$12.91

Federal / EPA Catalytic Converter - Universal Pre-OBDII Standard Duty

AP Exhaust

Part # 602206

Fits with Conditions

Federal / EPA Catalytic Converter - Universal Pre-OBDII Standard Duty

$67.67

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 4.5 In.

Dorman

Part # 675-209

Fits with Conditions

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 4.5 In.

$18.11

Walker Exhaust

Part # 31520

Fits with Conditions

Exhaust Pipe Flange Gasket

$16.67

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

Walker Exhaust

Part # 15042

Fits with Conditions

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

$141.45

Dorman

Part # 03106

Fits with Conditions

Exhaust Stud Kit - 3/8-16 x 3-5/16 In.

$12.84

AP Exhaust

Part # M212

Fits with Conditions

Exhaust Clamp

$6.71

Four Seasons

Part # 35334

Fits with Conditions

Flanged Vented CW Blower Motor w/ Wheel

$39.59

Walker Products

Part # 350-31027

Fits with Conditions

Walker Products 350-31027 Oxygen Sensor 1-W Direct Fit Narrow-Band

$31.89

Flanged Vented CW Blower Motor w/o Wheel

Four Seasons

Part # 35472

Fits with Conditions

Flanged Vented CW Blower Motor w/o Wheel

$40.35

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

Dorman

Part # 03113

Fits with Conditions

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

$10.28

Standard Motor Products

Part # HP7340

Fits with Conditions

Oxygen Sensor Connector

$13.89

Walker Exhaust

Part # 35335

Fits with Conditions

Exhaust Clamp

$5.69

Dorman

Part # 03112

Fits with Conditions

Exhaust Stud Kit - 3/8-16 x 2-1/2 In.

$9.91

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

Kooks Headers

Part # 7034-S

Confirmed Fit

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

$85.62

Delphi

Part # ES10966

Fits with Conditions

Oxygen Sensor

$21.41

Exhaust Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

Dorman

Part # 03147

Fits with Conditions

Exhaust Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

$13.69

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

Dorman

Part # 675-210

Fits with Conditions

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

$17.61

Frequently Asked Questions

Do these parts fit my 1985 GMC K1500 Sierra Classic?

This page groups parts listed for the 1985 GMC K1500 Sierra Classic. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What exhaust systems options are available for my 1985 GMC K1500 Sierra Classic?

We offer a wide selection of exhaust systems parts for the 1985 GMC K1500 Sierra Classic. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 1985 GMC K1500 Sierra Classic?

We carry parts from trusted brands including Dorman, Reinz, Walker Exhaust, AP Exhaust, and Kooks Headers, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 1985 GMC K1500 Sierra Classic parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 1985 GMC K1500 Sierra Classic parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

1985 GMC K1500(4,335 parts)

1985 GMC K1500(4,335 parts)

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Other GMC K1500 Years

Sierra Classic · Exhaust Systems (42 products)

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

Federal / EPA Catalytic Converter - Universal Pre-OBDII Standard Duty

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 4.5 In.

Exhaust Pipe Flange Gasket

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

Exhaust Stud Kit - 3/8-16 x 3-5/16 In.

Exhaust Clamp

Flanged Vented CW Blower Motor w/ Wheel

Walker Products 350-31027 Oxygen Sensor 1-W Direct Fit Narrow-Band

Flanged Vented CW Blower Motor w/o Wheel

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

Oxygen Sensor Connector

Exhaust Clamp

Exhaust Stud Kit - 3/8-16 x 2-1/2 In.

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

Oxygen Sensor

Exhaust Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

Frequently Asked Questions

Do these parts fit my 1985 GMC K1500 Sierra Classic?

What exhaust systems options are available for my 1985 GMC K1500 Sierra Classic?

What brands make parts for the 1985 GMC K1500 Sierra Classic?

How fast do 1985 GMC K1500 Sierra Classic parts ship?

What warranty do your 1985 GMC K1500 Sierra Classic parts come with?