GMC C25 Automatic Transmission Parts

Your One-Stop Shop For Trusted GMC C25 Automatic Transmission Parts

If you’re in search of GMC C25 Automatic Transmission Parts aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 25 Automatic Transmission Parts from top brands with prices ranging from $4.29 to $337.99.

Beyond great prices, we stock trusted brands manufacturing all types of Automatic Transmission Parts for your GMC C25.

And don’t forget to read customer reviews across all Automatic Transmission Parts categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Automatic Transmission Parts have to cost top dollar, and we prove it. Browse our top GMC C25 Automatic Transmission Parts below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

Please Select your Vehicle to See Exact Fit Parts

Essential GMC C25 Automatic Transmission Parts

Dorman – Help – Auto Transmission Case Vent (Part No.14689)

Auto Transmission Case Vent

from

$7.49
This transfer case vent is designed to match the fit and function of the original vent on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this transfer case vent is designed to match the fit and function of the original vent on specified vehicles
  • Restores functionality – reliable replacement for an original vent that has failed due to blockage or fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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B & M – Cable Bracket (Part No.30498)

Cable Bracket

from

$33.99
Cable Bracket, GM (Bandit style shifters only) APPLICATION: For TH-400, 350, 250, 200, 700R4, 200-4R with 80797, 80798 or 81050 shifter.

Product Features:
  • Shifter Service Parts
  • Steel
  • Natural Finish
  • Sold individually
  • Replacement for Bandit shifters
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B & M – Kickdown Switch Kit For TH400 Transmission (Part No.20297)

Kickdown Switch Kit For TH400 Transmission

from

$99.99
When swapping the TH400 transmission into any vehicle, this kit makes installation of the transmission’s kickdown feature a snap. This switch mounts to either a TH700R4, TH200, TH200-R4 or TH350 throttle cable bracket.

Product Features:
  • Allows High Speed Cruise
  • Cruise In Overdrive
  • Prevents Part Throttle Kickdown
  • Quick Installation
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ATP – AT CONTR SOLENOID (Part No.SE-1)

AT CONTR SOLENOID

from

$118.99
AT CONTR SOLENOID

ATP – AUTO TRANS BAND (Part No.JX-58)

AUTO TRANS BAND

from

$29.99
AUTO TRANS BAND

Carquest Premium – Automatic Transmission Modulator Valve (Part No.VMC1023)

Automatic Transmission Modulator Valve

from

$48.99
The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.

Product Features:
  • Application matched component ensures the transmission gear position system can be returned to like new condition.
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • This part will look and function just like the original unit being replaced.
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B & M – Modulator (Part No.20234)

Modulator

from

$49.99
B&M’s vacuum modulator is fully adjustable, this allows you to tailor your shift points to within a range of 2-4 mph. Comes preadjusted for normal shift points. For TH350 and TH400.

Product Features:
  • Fully Adjustable
  • Allows You To Tailor Shift Points
  • Comes Supplied Pre-Adjusted
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ATP – AT SOLENOID SEAL (Part No.JO-15)

AT SOLENOID SEAL

from

$4.29
AT SOLENOID SEAL

ATP – AT FRT PUMP BUSHING (Part No.CB-4)

AT FRT PUMP BUSHING

from

$11.79
AT FRT PUMP BUSHING

Dorman – Help – Clutch Pilot Bushing (Part No.14650)

Clutch Pilot Bushing

from

$11.99
This clutch pilot bushing is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this bushing is a reliable replacement for an original part that has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Hooker BlackHeart – Hooker BlackHeart Transmission Crossmember (Part No.BHS550)

Hooker BlackHeart Transmission Crossmember

from

$337.99
Product Features:
  • Revised Design with Lower Pricing
  • Fits 1973-1987 C10/15 2WD, 1979-1987 C20 2WD & 1973-1982 Blazer/Jimmy 2WD
  • LS/Gen-V LT Swap Transmission Crossmembers
  • Designed for Use with All 1973-1987 C10 LS/Gen-V LT Swap Components
  • Use with BHS540 Engine Mounting Brackets (Also Works with 12621HKR)
  • Designed Using CAD Modeling/FEA Analysis for Optimal Strength, Weight, Safety & Appearance
  • Welded Steel Construction w/ Black Powder Coated Finish
  • Provides an Optimum Engine/Transmission Inclination Angle That is Critical to Obtain Suitable U-Joint Working Angles, when installed with BHS540 Engine Mounting Brackets
  • Designed in Conjunction with Other Hooker BlackHeart C10 Engine Swap Parts to Provide Bolt-in Installation of Hooker LS and LT Swap Manifolds and Exhaust Systems for this Application
  • Provides the Highest Clearance Available for up to 3.00″ Exhaust System
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Hooker BlackHeart – Hooker BlackHeart Transmission Crossmember (Part No.BHS549)

Hooker BlackHeart Transmission Crossmember

from

$337.99
Product Features:
  • Revised Design with Lower Pricing
  • Fits 1973-1987 C10/15 2WD, 1979-1987 C20 2WD & 1973-1982 Blazer/Jimmy 2WD
  • LS/Gen-V LT Swap Transmission Crossmembers
  • Designed for Use with All 1973-1987 C10 LS/Gen-V LT Swap Components
  • Use with BHS540 Engine Mounting Brackets (Also Works with 12621HKR)
  • Designed Using CAD Modeling/FEA Analysis for Optimal Strength, Weight, Safety & Appearance
  • Welded Steel Construction w/ Black Powder Coated Finish
  • Provides an Optimum Engine/Transmission Inclination Angle That is Critical to Obtain Suitable U-Joint Working Angles, when installed with BHS540 Engine Mounting Brackets
  • Designed in Conjunction with Other Hooker BlackHeart C10 Engine Swap Parts to Provide Bolt-in Installation of Hooker LS and LT Swap Manifolds and Exhaust Systems for this Application
  • Provides the Highest Clearance Available for up to 3.00″ Exhaust System
See More

Hooker BlackHeart – Hooker BlackHeart Transmission Crossmember (Part No.BHS548)

Hooker BlackHeart Transmission Crossmember

from

$321.99
Product Features:
  • Revised Design with Lower Pricing
  • Fits 1973-1987 C10/15 2WD, 1979-1987 C20 2WD & 1973-1982 Blazer/Jimmy 2WD
  • LS/Gen-V LT Swap Transmission Crossmembers
  • Designed for Use with All 1973-1987 C10 LS/Gen-V LT Swap Components
  • Use with BHS540 Engine Mounting Brackets (Also Works with 12621HKR)
  • Designed Using CAD Modeling/FEA Analysis for Optimal Strength, Weight, Safety & Appearance
  • Welded Steel Construction w/ Black Powder Coated Finish
  • Provides an Optimum Engine/Transmission Inclination Angle That is Critical to Obtain Suitable U-Joint Working Angles, when installed with BHS540 Engine Mounting Brackets
  • Designed in Conjunction with Other Hooker BlackHeart C10 Engine Swap Parts to Provide Bolt-in Installation of Hooker LS and LT Swap Manifolds and Exhaust Systems for this Application
  • Provides the Highest Clearance Available for up to 3.00″ Exhaust System
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Mr. Gasket – Chrome Automatic Transmission Dipstick & Tube – 27" Length (Part No.9764)

Chrome Automatic Transmission Dipstick & Tube - 27" Length

from

$34.49
Includes dipstick with chromed steel handle and chromed steel dipstick tube with mounting tab. 27 inch long.

Product Features:
  • Fits GM Th350 – Chevy Specific. Modify For Others
  • 27 In Length
  • Chrome Plated Steel
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Mr. Gasket – A/Tdipstick (Part No.9703G)

A/Tdipstick

from

$95.99
Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.

Product Features:
  • Braided Stainless Steel
  • Firewall Mounting
  • Includes Oil Fill Tube
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ATP – AT OIL PUMP ORING (Part No.SO-21)

AT OIL PUMP ORING

from

$9.59
AT OIL PUMP ORING

ATP – AT CLUTCH PLATE (Part No.JC-57)

AT CLUTCH PLATE

from

$13.79
AT CLUTCH PLATE

ATP – AT CLUTCH PLATE (Part No.JC-50)

AT CLUTCH PLATE

from

$9.59
AT CLUTCH PLATE

ATP – Automatic Transmission Detent Cable (Part No.Y-103)

Automatic Transmission Detent Cable

from

$32.99
Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit and function just like the original part to ensure durability and long life.

Product Features:
  • Includes brackets, grommets, etc to match original
  • Helps transmission determine ideal downshift
  • Improves vehicle performance
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ATP – ATP Automatic Transmission Detent Cable (Part No.Y-100)

ATP Automatic Transmission Detent Cable

from

$23.99
Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit And function just like the original part to ensure durability And long life.

Product Features:
  • Includes brackets, grommets, etc to match original
  • Helps transmission determine ideal downshift
  • Improves vehicle performance
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ATP – Automatic Transmission Universal Detent Cable 28 to 48 inches (Part No.Y-754)

Automatic Transmission Universal Detent Cable 28 to 48 inches

from

$49.99
ATP Universal Fit Detent Cables are designed to cover many applications and are no compromise replacement parts

Product Features:
  • Includes brackets, grommets, etc to match original
  • Fits many GM transmissions
  • Adjustable
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Automatic Transmission Parts Brands You Can Trust For Your GMC C25

7 trusted brands of Automatic Transmission Parts line our shelves, ready to help keep your GMC C25 running smooth. Below are some of the most popular brands and their top Automatic Transmission Parts offerings:

Popular Dorman – Help Automatic Transmission Parts

Dorman – Help products for the GMC C25 span several categories. Some of the highest-rated Dorman – Help Automatic Transmission Parts that will fit your GMC C25 are:
Auto Transmission Case Vent
from $7.49
(4)
Auto Transmission Case Vent
Automatic Transmission Case Vents
Clutch Pilot Bushing
from $11.99
(1)
Clutch Pilot Bushing
Transmission Bushings

Top GMC C25 Automatic Transmission Parts from Pro-King

Your GMC C25 will be purring again thanks to Pro-King brand Automatic Transmission Parts available for online order or in-store pick up. Popular Pro-King parts include:
Automatic Transmission Vacuum Modulator
from $21.99
(11)
Automatic Transmission Vacuum Modulator
Transmission Modulator Valves
Automatic Transmission Vacuum Modulator
from $33.99
(11)
Automatic Transmission Vacuum Modulator
Transmission Modulator Valves

Most Purchased GMC C25 Automatic Transmission Parts from Pro-King

When you buy the most frequently purchased Pro-King brand Automatic Transmission Parts, you can be confident it will be the right part for your GMC C25. Here are the Pro-King Automatic Transmission Parts Advanced Auto customers buy the most:
Automatic Transmission Vacuum Modulator
from $21.99
(11)
Automatic Transmission Vacuum Modulator
Transmission Modulator Valves
Chrome Automatic Transmission Dipstick & Tube - 27" Length
from $34.49
(5)
Chrome Automatic Transmission Dipstick & Tube – 27" Length
Transmission Dipsticks
ATP Automatic Transmission Detent Cable
from $23.99
(1)
ATP Automatic Transmission Detent Cable
Detent Cables

FAQs for GMC C25 Automatic Transmission Parts

What are the most purchased Automatic Transmission Parts for the GMC C25?

Out of 25 Automatic Transmission Parts for the GMC C25, the most popular in our inventory are:
Chrome Automatic Transmission Dipstick & Tube - 27" Length
from $34.49
(5)
Chrome Automatic Transmission Dipstick & Tube – 27" Length
Transmission Dipsticks
ATP Automatic Transmission Detent Cable
from $23.99
(1)
ATP Automatic Transmission Detent Cable
Detent Cables
AT SOLENOID SEAL
from $4.29
(2)
AT SOLENOID SEAL
Automatic Transmission Fluid Filler Tube Seals

What are the top-rated GMC C25 Automatic Transmission Parts?

Top-rated Automatic Transmission Parts for your GMC C25 based on customer reviews/ratings are:
Modulator
from $49.99
(2)
Modulator
“Great product. Worked perfectly”