Refurbished 4L60E valve body with solenoids and pressure switch manifold for 1995-2005 Astro, Trailblazer, Envoy, Yukon, Colorado and B-body cars.
If you're chasing a shift problem in a 1995-2005 Chevy Astro, a 2002-2009 Trailblazer or Envoy, a 2004-2006 Colorado, a 2000-2005 Yukon, or a 1995-1996 B-body car like an Impala SS, Roadmaster, or Fleetwood, the 4L60E valve body and its solenoid pack is the first place to look once fluid and codes check out. This is a refurbished 4L60E valve body assembly - the pictured unit is stamped casting number 24203537 - shipped complete with its solenoids and pressure switch manifold already mounted and tested, so it goes in as one unit instead of a stack of separate parts to match.
The 4L60E valve body is the hydraulic control center of the transmission. The pressure regulator and boost valve set main line pressure, the actuator feed limit (AFL) valve feeds the shift solenoids, and the TCC regulator and isolator valves apply the torque converter clutch. On this generation the shift solenoids and the pressure switch manifold, which reports which gear the valve body has actually commanded back to the computer, are built into the assembly, which is why this unit ships with them mounted rather than as a bare casting.
Our 4L60E shift solenoid symptoms guide covers how to tell a bad solenoid from a worn valve body bore before you spend on parts.
Scan for codes and check fluid condition, and if the solenoids were already replaced without fixing the shift quality, that points at the valve body itself rather than the solenoids. Bore wear in 4L60E valve bodies is well documented; our valve body wear guide explains which circuits fail first and why a solenoid swap alone often does not hold.
This listing covers 1995-2005 Chevy Astro 4.3L, 2002-2009 Trailblazer and Envoy 4.2L, 2004-2006 Colorado 2.8L and 3.5L, 2000-2005 Yukon 4.8L and 5.3L, and the 1995-1996 B-body cars - Impala SS, Roadmaster, and Fleetwood - with the 5.7L. GM changed the solenoid pack and connector style more than once across that span, so the pictured casting number, 24203537, has to match your old unit, not just the vehicle and model year. Pull your old valve body and compare the casting number stamped on it before ordering, or send us your VIN and we will confirm. The other 4L60E valve bodies we carry are on the 4L60E parts page.
Drop the pan, unplug the internal harness, disconnect the manual valve link, and lower the valve body straight down. Do this slowly - the check balls will fall out of their bores if the assembly is tipped or dropped, and a checkball seated in the wrong bore causes a shift problem that looks identical to the one you just fixed. Fit new separator plate gaskets, torque the bolts center-out to the factory sequence, refill with Dexron VI and a new filter, then reset adaptive learning and road test. A refurbished master solenoid kit or the front pump alignment tool are worth having on hand if you are doing more than a bolt-in swap.
| Transmission | GM 4L60E / 4L65E |
| Pictured casting | 24203537 |
| Assembly | Valve body with solenoids and pressure switch manifold |
| Condition | Refurbished |
| Listed fitment | Astro 95-05, Trailblazer/Envoy 02-09, Colorado 04-06, Yukon 00-05, Impala/Roadmaster/Fleetwood 95-96 |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Refurbished means cleaned, inspected, and tested, with occasional cosmetic handling marks on the outside, but not rebuilt with new or updated internal valves. It goes in working and tested, just not upgraded like our remanufactured units.
The 1995-1996 B-body cars with the 5.7L are listed, but you still need to match the casting number, 24203537, stamped on your old unit before ordering.
2002-2009 models with the 4.2L are covered by this listing. Confirm the casting number on your old valve body matches before you install it.
The valve body casting with the solenoids and pressure switch manifold already mounted, bench-tested before it ships.
A checkball seated in the wrong bore produces shift problems that look just like the original failure. Keep the assembly level while removing and installing it, and check ball locations against a service reference if any fall loose.
A new filter, pan gasket, and fresh Dexron VI at minimum. If the solenoids on your old unit were original equipment, a fresh solenoid kit is worth having on hand.
