GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy Suburban 4WD - RHD 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Fuel Gauge Always Indicates Full

Fuel Gauge Always Indicates Full Gasoline

Step

Action

Value(s)

Yes

No

1
  1. Disconnect the connector at the instrument cluster.
  2. Install a fused jumper wire between B+ and instrument cluster pin 31.
  3. Install a fused jumper wire between instrument cluster pin 29 and the engine or chassis ground.
  4. Install a fused jumper wire between instrument cluster pin 23 and ground.
  5. Turn the ignition switch to RUN.

Does the fuel gauge indicate full?

--

Go to Step 2

Go to Step 3

2

Replace the instrument cluster.

Is the repair complete?

--

System OK

--

3
  1. Remove the fused jumper wires from the instrument cluster and connect the connector.
  2. Disconnect the connector at the fuel pump and sender.
  3. Connect a fused jumper wire between the fuel pump and sender connector cavity A and the engine or chassis ground.

Does the fuel gauge indicate full?

--

Go to Step 4

Go to Step 5

4

Locate and repair the open in the CKT 30 (PPL) wire between the following locations:

  1. Instrument cluster and connector C1 cavity 9 of the vehicle control module (VCM).
  2. CKT 1589 (PPL/WHT) wire between the VCM connector C3 cavity 13 and the fuel pump and sender cavity A.

Is the repair complete?

--

System OK

--

5

Replace the fuel pump and sender.

Is the repair complete?

--

System OK

--

Fuel Gauge Always Indicates Full Diesel

Step

Action

Value(s)

Yes

No

1
  1. Disconnect the connector at the instrument cluster.
  2. Install a fused jumper wire between B+ and instrument cluster pin 31.
  3. Install a fused jumper wire between instrument cluster pin 29 and the engine or chassis ground.
  4. Install a fused jumper wire between instrument cluster pin 23 and ground.
  5. Turn the ignition switch to RUN.

Does the fuel gauge indicate full?

--

Go to Step 2

Go to Step 3

2

Replace the instrument cluster.

Is the repair complete?

--

System OK

--

3
  1. Remove the fused jumper wires from the instrument cluster and connect the connector.
  2. Disconnect the connector at the fuel gauge sender.
  3. Connect a fused jumper wire between the fuel gauge sender connector cavity B and the engine or chassis ground.

Does the fuel gauge indicate full?

--

Go to Step 4

Go to Step 5

4

Locate and repair the open in the CKT 30 (PPL) wire between the instrument cluster and the fuel gauge sender.

Is the repair complete?

--

System OK

--

5

Install a fused jumper wire at the fuel gauge sender connector between cavity A and cavity B.

Does the fuel gauge indicate full?

--

Go to Step 6

Go to Step 7

6

Locate and repair the open in the CKT 451(BLK/WHT) wire between the fuel gauge sender and ground.

Is the repair complete?

--

System OK

--

7

Replace the fuel gauge sender.

Is the repair complete?

--

System OK

--