21+ 1977 GMC Jimmy Mufflers & Resonators Sierra Classic Parts

Sierra Classic · Mufflers & Resonators (18 products)

Exact-fit parts for the 1977 GMC Jimmy Sierra Classic.

Magnaflow

Part # 93506

Confirmed Fit

MagnaFlow Conv Univ 2.5 FED

$177.00

Magnaflow

Part # 3391432

Confirmed Fit

MagnaFlow Conv DF 1994 GMA G3500 V6 4.3L

$1158.00

SoundFX Universal Universal Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

Walker Exhaust

Part # 17831

Fits with Conditions

SoundFX Universal Universal Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

$48.37

Magnaflow

Part # 339106

Confirmed Fit

MagnaFlow Conv Universal 2.5in Inlet 2.5in Outlet 16in Length

$523.00

Cometic Chevrolet Gen-3 Inline 6 .059in CFM-20 Intake Exhaust Manifold Gasket

Cometic Gasket

Part # C15010-059

Confirmed Fit

Cometic Chevrolet Gen-3 Inline 6 .059in CFM-20 Intake Exhaust Manifold Gasket

$64.74

Cometic Chevrolet Gen-1 Small Block V8 .030in MLS Exhaust Manifold Gasket Set - 1.625in Round Ports

Cometic Gasket

Part # C5893-030

Confirmed Fit

Cometic Chevrolet Gen-1 Small Block V8 .030in MLS Exhaust Manifold Gasket Set - 1.625in Round Ports

$52.20

Cometic GM Small Block Aluminum/Rubber Exhaust Port Cover Set - 18 Degree Heads

Cometic Gasket

Part # C5258

Confirmed Fit

Cometic GM Small Block Aluminum/Rubber Exhaust Port Cover Set - 18 Degree Heads

$72.52

Quiet-Flow Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

Walker Exhaust

Part # 21784

Fits with Conditions

Quiet-Flow Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

$55.69

MAHLE Original Chevrolet C10 Pickup 69-68 Exhaust Pipe Flange Gasket

Victor Reinz

Part # F7192

Confirmed Fit

MAHLE Original Chevrolet C10 Pickup 69-68 Exhaust Pipe Flange Gasket

$17.48

Fel-Pro

Part # 9587

Confirmed Fit

Fel-Pro Chevrolet C10 Exhaust Pipe Flange Gasket

$2.24

MAHLE Original Buick Apollo 75-73 Intake To Exhaust Hot Spot

Victor Reinz

Part # B7354

Confirmed Fit

MAHLE Original Buick Apollo 75-73 Intake To Exhaust Hot Spot

$15.73

MAHLE Original Buick Century 80-77 Exhaust Gas Recirculation Valve Gasket

Victor Reinz

Part # G26748

Confirmed Fit

MAHLE Original Buick Century 80-77 Exhaust Gas Recirculation Valve Gasket

$15.67

Fel-Pro

Part # 9672

Confirmed Fit

Fel-Pro Chevrolet Camaro 9672 Exhaust Pipe Flange Gasket

$8.67

Magnaflow

Part # 93432

Confirmed Fit

MagnaFlow Conv DF GM 25inch x 7inch x 4inch 2.5/2.5inch

$219.00

Fel-Pro

Part # 60986

Confirmed Fit

Fel-Pro Chevrolet C10 60986 Exhaust Pipe Flange Gasket

$7.05

MAHLE Original Chevrolet 3A 59 Exhaust Pipe Flange Gasket

Victor Reinz

Part # F7135

Confirmed Fit

MAHLE Original Chevrolet 3A 59 Exhaust Pipe Flange Gasket

$17.09

MAHLE Original Checker Marathon 69-65 Exhaust Pipe Packing Ring

Victor Reinz

Part # F7139

Confirmed Fit

MAHLE Original Checker Marathon 69-65 Exhaust Pipe Packing Ring

$15.27

SoundFX Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

Walker Exhaust

Part # 18293

Fits with Conditions

SoundFX Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

$41.09

All 18 products shown

Frequently Asked Questions

Do these parts fit my 1977 GMC Jimmy Sierra Classic?

This page groups parts listed for the 1977 GMC Jimmy 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 mufflers & resonators options are available for my 1977 GMC Jimmy Sierra Classic?

We offer a wide selection of mufflers & resonators parts for the 1977 GMC Jimmy 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 1977 GMC Jimmy Sierra Classic?

We carry parts from trusted brands including Victor Reinz, Magnaflow, Cometic Gasket, Fel-Pro, and Walker Exhaust, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 1977 GMC Jimmy 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 1977 GMC Jimmy 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.

1977 GMC Jimmy(2,190 parts)

1977 GMC Jimmy(2,190 parts)

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Other GMC Jimmy Years

Sierra Classic · Mufflers & Resonators (18 products)

MagnaFlow Conv Univ 2.5 FED

MagnaFlow Conv DF 1994 GMA G3500 V6 4.3L

SoundFX Universal Universal Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

MagnaFlow Conv Universal 2.5in Inlet 2.5in Outlet 16in Length

Cometic Chevrolet Gen-3 Inline 6 .059in CFM-20 Intake Exhaust Manifold Gasket

Cometic Chevrolet Gen-1 Small Block V8 .030in MLS Exhaust Manifold Gasket Set - 1.625in Round Ports

Cometic GM Small Block Aluminum/Rubber Exhaust Port Cover Set - 18 Degree Heads

Quiet-Flow Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

MAHLE Original Chevrolet C10 Pickup 69-68 Exhaust Pipe Flange Gasket

Fel-Pro Chevrolet C10 Exhaust Pipe Flange Gasket

MAHLE Original Buick Apollo 75-73 Intake To Exhaust Hot Spot

MAHLE Original Buick Century 80-77 Exhaust Gas Recirculation Valve Gasket

Fel-Pro Chevrolet Camaro 9672 Exhaust Pipe Flange Gasket

MagnaFlow Conv DF GM 25inch x 7inch x 4inch 2.5/2.5inch

Fel-Pro Chevrolet C10 60986 Exhaust Pipe Flange Gasket

MAHLE Original Chevrolet 3A 59 Exhaust Pipe Flange Gasket

MAHLE Original Checker Marathon 69-65 Exhaust Pipe Packing Ring

SoundFX Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2" Outlet (OD)

Frequently Asked Questions

Do these parts fit my 1977 GMC Jimmy Sierra Classic?

What mufflers & resonators options are available for my 1977 GMC Jimmy Sierra Classic?

What brands make parts for the 1977 GMC Jimmy Sierra Classic?

How fast do 1977 GMC Jimmy Sierra Classic parts ship?

What warranty do your 1977 GMC Jimmy Sierra Classic parts come with?