OPGI.com works best with JavaScript enabled.
1‑800‑243‑8355

As seen on

  • Detroit Muscle Logo
  • Ride of Your Life Logo

Old Air Products

Duct Hose, GM Vehicles, Heater & A/C, 1-¾", Cloth, 6-Foot long

Part# : CH37378
Sold As: Each
Ship Size: Standard
Price Match: Eligible
$53.99
List Price: $59.95
You Save 10%
Calendar IconArriving Soon
Vehicle Specific View fitment for 62 models
Add To Wishlist 

GM Heater/A/C Corrugated Cloth Duct Hose (1-3/4-inch x 6-foot) by Old Air Products®

Corrugated cloth duct hose provides a 6-foot service length for heater/A/C outlet routing.

This Old Air Products® corrugated cloth duct hose is sized at 1-3/4-inch and supplied in a 6-foot length. It is used to connect heater/A/C case outlets with dash ducts or deflectors and can be cut to the required service length for the vehicle. The specified diameter allows the replacement hose to match the duct connection rather than using an oversized universal hose.

• 1-3/4-inch inside diameter • 6-foot service length • Corrugated cloth duct hose • Heater/A/C duct routing • Old Air Products® part 91-50C

We aim to provide accurate and complete product information. If you notice anything incorrect, missing, or unclear, please let us know.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1982 Buick Grand National Cloth - 1-3/4" x 6-ft.
1984–1987 Buick Grand National Cloth - 1-3/4" x 6-ft.
1976–1987 Buick Regal Cloth - 1-3/4" x 6-ft.
1963–1976 Buick Riviera Cloth - 1-3/4" x 6-ft.
1961–1972 Buick Skylark Cloth - 1-3/4" x 6-ft.
1983–1986 Buick T-Type Cloth - 1-3/4" x 6-ft.
1938–1993 Cadillac 60 Special Cloth - 1-3/4" x 6-ft.
2013–2019 Cadillac ATS Cloth - 1-3/4" x 6-ft.
1965–1976 Cadillac Calais Cloth - 1-3/4" x 6-ft.
2003–2019 Cadillac CTS Cloth - 1-3/4" x 6-ft.
1959–2005 Cadillac DeVille Cloth - 1-3/4" x 6-ft.
1953–2002 Cadillac Eldorado Cloth - 1-3/4" x 6-ft.
1999–2000 Cadillac Escalade Cloth - 1-3/4" x 6-ft.
2002–2023 Cadillac Escalade Cloth - 1-3/4" x 6-ft.
2002–2013 Cadillac Escalade EXT Cloth - 1-3/4" x 6-ft.
1965–1996 Cadillac Fleetwood Cloth - 1-3/4" x 6-ft.
1936–1951 Cadillac Series 60 Cloth - 1-3/4" x 6-ft.
1946–1964 Cadillac Series 60 Fleetwood  
1936–1951 Cadillac Series 61 Cloth - 1-3/4" x 6-ft.
1937–1976 Cadillac Series 62 Cloth - 1-3/4" x 6-ft.
1936–1951 Cadillac Series 63 Cloth - 1-3/4" x 6-ft.
1937–1938 Cadillac Series 65 Cloth - 1-3/4" x 6-ft.
1936–1942 Cadillac Series 67 Cloth - 1-3/4" x 6-ft.
1936–1937 Cadillac Series 70 Cloth - 1-3/4" x 6-ft.
1940 Cadillac Series 72 Cloth - 1-3/4" x 6-ft.
1936–1942 Cadillac Series 75 Cloth - 1-3/4" x 6-ft.
1946–1964 Cadillac Series 75 Cloth - 1-3/4" x 6-ft.
1946–1964 Cadillac Series 75 Fleetwood  
1976–2004 Cadillac Seville Cloth - 1-3/4" x 6-ft.
2005–2011 Cadillac STS Cloth - 1-3/4" x 6-ft.
2004–2009 Cadillac XLR Cloth - 1-3/4" x 6-ft.
1947–1955 Chevrolet Advance Design  
1969–1994 Chevrolet Blazer Cloth - 1-3/4" x 6-ft.
1960–1987 Chevrolet C10 Cloth - 1-3/4" x 6-ft.
1960–1987 Chevrolet C20 Cloth - 1-3/4" x 6-ft.
1960–1987 Chevrolet C30 Cloth - 1-3/4" x 6-ft.
1964–1977 Chevrolet Chevelle Cloth - 1-3/4" x 6-ft.
1960–1969 Chevrolet Corvair Cloth - 1-3/4" x 6-ft.
1961–1965 Chevrolet Corvair 95 FC Cloth - 1-3/4" x 6-ft.
1959–1960 Chevrolet El Camino Cloth - 1-3/4" x 6-ft.
Cloth - 1-3/4" x 6-ft.
1964–1987 Chevrolet El Camino Cloth - 1-3/4" x 6-ft.
Cloth - 1-3/4" x 6-ft.
1960–1987 Chevrolet K10 Cloth - 1-3/4" x 6-ft.
1960–1987 Chevrolet K20 Cloth - 1-3/4" x 6-ft.
1977–1987 Chevrolet K30 Cloth - 1-3/4" x 6-ft.
1978–1983 Chevrolet Malibu Cloth - 1-3/4" x 6-ft.
1997–2022 Chevrolet Malibu  
1970–1988 Chevrolet Monte Carlo 1970–1977: Cloth - 1-3/4" x 6-ft.
Cloth - 1-3/4" x 6-ft.
1995–2007 Chevrolet Monte Carlo Cloth - 1-3/4" x 6-ft.
1960–1991 Chevrolet Suburban Cloth - 1-3/4" x 6-ft.
1955–1959 Chevrolet Task Force Cloth - 1-3/4" x 6-ft.
1955–1959 GMC Blue Chip Cloth - 1-3/4" x 6-ft.
1960–1987 GMC C15/C1500 Cloth - 1-3/4" x 6-ft.
1960–1987 GMC C25/C2500 Cloth - 1-3/4" x 6-ft.
1960–1987 GMC C35/C3500 Cloth - 1-3/4" x 6-ft.
1978–1987 GMC Caballero Cloth - 1-3/4" x 6-ft.
1970–1991 GMC Jimmy Cloth - 1-3/4" x 6-ft.
1960–1987 GMC K15/K1500 Cloth - 1-3/4" x 6-ft.
1960–1987 GMC K25/K2500 Cloth - 1-3/4" x 6-ft.
1977–1987 GMC K35/K3500 Cloth - 1-3/4" x 6-ft.
1947–1955 GMC New Design Cloth - 1-3/4" x 6-ft.
1971–1977 GMC Sprint Cloth - 1-3/4" x 6-ft.
1960–1991 GMC Suburban  
1961–1988 Oldsmobile Cutlass Cloth - 1-3/4" x 6-ft.
1958–1986 Pontiac Bonneville Cloth - 1-3/4" x 6-ft.
1959–1977 Pontiac Catalina Cloth - 1-3/4" x 6-ft.
1962–1987 Pontiac Grand Prix Cloth - 1-3/4" x 6-ft.
1964–1973 Pontiac GTO Cloth - 1-3/4" x 6-ft.
1961–1981 Pontiac LeMans Cloth - 1-3/4" x 6-ft.
1961–1970 Pontiac Tempest Cloth - 1-3/4" x 6-ft.
  • Headshot of OPGI Employee
    Need help finding the right GM restoration parts? Contact a GM Parts Specialist
    Chat Unknown Status Call Toll-Free
    Mon–Fri 8:00–4:30 PT
    Sat 10:00–3:00 PT
     GM Parts Specialist Offline
  • Price Match Guarantee Great parts. Competitive prices. Guaranteed.
  • GM Restoration Experts Since 1982 Over four decades dedicated to GM restoration
  • Original GM Is Our Standard Original GM parts and factory references guide every reproduction
  • A Deeper GM Selection Thousands of restoration, performance, and replacement parts

Customers Who Viewed This Item Also Viewed

Reviews (0)

UH OH! Product reviews didn't load.
Please reload the page, or unblock our review partner Yotpo.com.
Duct Hose, GM Vehicles, Heater & A/C, 1-¾
Old Air Products Duct Hose, GM Vehicles, Heater & A/C, 1-¾", Cloth, 6-Foot long