Genuine Moog K6139 Idler Arm (NORS)
Restore the precise steering and original road feel of your classic GM truck, van, or SUV with this genuine Moog K6139 Idler Arm. This is an authentic New Old Replacement Stock (NORS) component, manufactured in the USA by Moog, the long-standing leader in heavy-duty chassis restoration. Designed specifically for a wide range of Chevrolet and GMC vehicles from 1968 through 1982—including C10/C20 pickups, Blazer, Suburban, and G-series vans—this idler arm serves as a critical pivot point for your steering linkage. It is engineered to original equipment specifications to eliminate steering wander and front-end vibrations. As a vintage part manufactured decades ago, it provides the superior metallurgical strength and exact fitment required to maintain the reliability and safety of your high-standard restoration.
Key Features:
- Brand: Moog
- Part Number: K6139
- Interchange: GM 3918231, TRW 18674, McQuay-Norris FA686
- Position: Front Steering Linkage
- Engine Fitment: All V8 & L6 Engines
- Origin: Made in USA
- Condition: New Old Replacement Stock (NORS)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Engine |
Notes |
| Chevrolet / GMC |
C10 / C20 / C1500 Pickup |
1968-1972 |
All Engines |
2WD Models Only |
| Chevrolet / GMC |
Blazer / Jimmy |
1969-1972 |
All Engines |
2WD Models Only |
| Chevrolet / GMC |
Suburban (C10/C20) |
1968-1972 |
All Engines |
2WD Models Only |
| Chevrolet / GMC |
G10 / G20 / G30 Van |
1971-1982 |
All Engines |
Includes Chevy Van & GMC Vandura |
| Chevrolet / GMC |
P10 / P20 / P30 Van |
1968-1972 |
All Engines |
Step-Van / Forward Control Chassis |
Fits Years:
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Unbeatable Prices & Expectations
We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our prices are often significantly lower than major competitors. All items are vintage stock, manufactured decades ago by aftermarket leaders like Moog but never installed. As such, original packaging may show signs of shelf wear (dust, fading, or tape), and unpainted metal components may have minor surface-level oxidation that does not affect performance. For NORS parts, please note these are vintage components manufactured by reputable aftermarket brands decades ago but never installed.
