When transmission is shifted into reverse it does not Move

Hi,

I will need to confirm the engine size. I suspect it is a 4.3L if it's a v6.

As far as the problem, have you checked fluid level and condition? Does anything happen when you place it in reverse? Does it seem to be in neutral when you place it in reverse?

If the fluid is clean and full, first confirm that the shift cable is moving the shift lever on the transmission properly. See pics 1 and 2 for cable connection location.

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If the cable is working properly, I need to know if the check engine is staying on when the engine is running. If it is, have the computer scanned for diagnostic trouble codes.

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If there are no codes and the fluid is clean and full, the next thing would be to check line pressure. Here are directions for checking:

2000 Chevy Truck S10/T10 P/U 4WD V6-4.3L VIN W
Line Pressure Check
Vehicle Transmission and Drivetrain Automatic Transmission/Transaxle Testing and Inspection Component Tests and General Diagnostics 4L60-E/4L65-E Automatic Transmission Line Pressure Check
LINE PRESSURE CHECK

pic 3

Line pressures are calibrated for two sets of gear ranges-Drive-Park-Neutral and Reverse. This allows the transmission line pressure to be appropriate for different pressure needs in different gear ranges:

pic 4

Before performing a line pressure check, verify that the Pressure Control (PC) solenoid for the transmission is receiving the correct electrical signal from the PCM:
1. Install a Scan Tool.

Caution: Keep the brakes applied at all times in order to prevent unexpected vehicle motion. Personal injury may result if the vehicle moves unexpectedly.

Important: The transmission may experience harsh, soft or mushy shifts for up to two days later.

2. Start the engine and set the parking brake.
3. Check for diagnostic trouble codes, including a stored diagnostic code for the PC solenoid.
4. Repair the vehicle if necessary. Include the following areas:
Inspect the fluid level
Inspect the manual linkage at the transmission
Install or connect the Scan Tool.
Install or connect the oil pressure gauge at the line pressure tap.

5. Put the gear selector in Park and set the parking brake.
6. Start the engine and allow the engine to warm up at idle.
7. Access the PCS Control test on the Scan Tool.
8. Increase DESIRED PCS in 0.1 amp increments. Read the corresponding line pressure on the pressure gauge. Allow the pressure to stabilize for five seconds after each current charge.
9. Compare your data to the Drive-Park-Neutral line pressure table below.

If your pressure readings differ greatly from the line pressure table, refer to the Diagnosis Tables.
The Scan Tool is only able to control the PC solenoid in Park and Neutral with the vehicle stopped. This protects the clutches from extremely high or low pressures in Drive or Reverse ranges.
Refer to the Line Pressure table. The pressures in the table assume an engine speed of 1500 RPM and a temperature of 66°C (150°F). The pressure will vary with a change in temperature.

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Keep in mind, it could be something internal.

Let me know if this helps or if you have other questions.

Take care,
Joe

Hi,

As far as not having reverse, the vacuum hose is unlikely. If you tell me approximately where it is located, I will try to help you find where it goes.

Now for the reverse issue, I attached a pic below that shows possible causes of no reverse or if it slips in reverse. (Pic 1) Note that they are indicating the transmission needs taken apart to identify the problem.

If you look at pic 2, it shows the evap vacuum hose routing. Here is the legend to identify parts in pic 2.

(1)EVAP Purge Solenoid Ignition Positive Voltage
(2)To Intake Manifold Port
(3)Fuel Tank Pressure Sensor
(4)Fuel Tank Pressure Sensor Ground Circuit
(5)Fuel Tank Pressure Sensor Signal Circuit
(6)Fuel Tank Pressure Sensor 5V Reference Circuit
(7)Fuel Filler Neck
(8)Rollover Valve
(9)Fuel Tank
(10)EVAP Vent Valve
(11)EVAP Vent Valve Control Circuit
(12)EVAP Vent Valve Ignition Positive Voltage
(13)EVAP Canister
(14)EVAP Purge Solenoid
(15)EVAP Purge Solenoid Control Circuit

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Pic 3 shows evap hose routing.

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There are other vacuum hoses related to the HVAC system. If you need them, I can provide them for you. I will just need some basic info. For example, does it have A/C? Is it a dual climate control or single control system?

Let me know.
Joe