Yes it's your vacuum module .
SOURCE: I have a 93 Chevy Suburban 1500 and the
yes just change out the tail shaft the electric speed o into the older one i just changed out a 84 to a 93 trans very easy
SOURCE: 2002 chevy trailblazer, replacing the transmission lines
the are located behind the dipstick on the passenger side of the transmission, you must remove the retainer clips and pull straight out the same as to the radiator. You may beed to remove the heat shield on the side of the transmission to ease acces
SOURCE: 94 chevy suburban transmission not shifting have
Before guessing at transmission problems, check the fluid level (car warmed up, engine running in Park on level ground) and have the PCM scanned for trouble codes FIRST.
Secondly, put a line pressure gauge (or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve (easy fix in pan).
1-2 shift does not happen at WOT or until you let off the gas: Best case: * Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace the TPS. - * Middle case: leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. / *Worst case: poor line pressure rise 1-2 accumulator piston cracked or stuck cocked in the bore. Check the yellow spring inside the accum housing for breakage. Also, if the accumulator housing walls are scored, the housing must be replaced. Easy fix in the pan.
Good luck and thank you for using Fixya. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the trans may help (must remove valvebody), or adding a high-viscosity additive such as Lucas Transmission additive or other seal restorer product. May also have worn boost valve (can replace in the pan).
SOURCE: 2002 chevy malibu transmission soleniod
It doesn't sound like a solenoid, check the universals and if it's not those, it is more than likely a linkage problem,
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SOURCE: Need a vacuum hose routing
Thinking this third hose is the actual vacuum hose that goes to the T near the vacuum reservoir located in the drivers side fender just below the antilock brake assembly. There is a one way valve in the line from the transmission to the T.
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