GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 Fuel Gage Inaccurate or Inoperative
Table 1: Fuel Gauge Inoperative
Table 2: Fuel Gauge Scan Tool Data

Fuel Gauge Inoperative

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Gauge System Check?

--

Go to Step 2

Go to Gauge System Check

2

Using a scan tool, attempt to establish communications with the PCM.

Does the scan tool communicate with the PCM?

--

Go to Step 3

Go to Powertrain On Board Diagnostic (OBD) System Check

3

Is a DTC P0461, P0462, P0463, P1431, P1432, or P1433 stored in the PCM?

--

Go to Powertrain On Board Diagnostic (OBD) System Check

Go to Step 4

4

Using a scan tool, attempt to establish communications with the IPC.

Does the scan tool communicate with the IPC?

--

Go to Step 5

Go to Diagnostic System Check - Instrument Cluster

5
  1. Turn ON the ignition switch.
  2. Using a scan tool, select IPC data display and monitor fuel remaining.

Is the scan tool able to display fuel remaining?

0-72.3 L (0-19.1 gal)

Go to Step 6

Go to Step 7

6

Use the Fuel Gauge Scan Tool Data Table to compare the IPC fuel remaining display data on the scan tool with the fuel gauge display.

Does the scan tool display correspond with fuel gauge display?

Within 1/8

System OK

Go to Step 8

7

Using a scan tool, select PCM data display and monitor fuel tank level remaining.

Is the scan tool able to display fuel tank level remaining?

0-72.3 L (0-19.1 gal)

Go to Step 8

Go to Powertrain On Board Diagnostic (OBD) System Check

8

Replace the IPC assembly. Refer to Instrument Cluster Replacement .

Is the replacement complete?

--

Go to Step 9

--

9
  1. Turn OFF the ignition switch.
  2. Reconnect or install any connectors or components that were disconnected or removed.
  3. Turn ON the ignition switch.

Is the repair complete?

--

Go to Gauge System Check

--

Fuel Gauge Scan Tool Data

IPC Gauge Display

IPC Scan Tool Display Fuel Remaining

(Data recieved from PCM)

(E) EMPTY

4.6-12 L

(1.2-3.1 gal)

1/16

13.6 L

(3.5 gal)

1/8

15.36 L

(4.0 gal)

3/16

18.77 L

(4.9 gal)

1/4

21.65 L

(5.7 gal)

5/16

24.3 L

(6.4 gal)

3/8

28.25 L

(7.4 gal)

7/16

32.2 L

(8.5 gal)

1/2

36.15 L

(9.5 gal)

9/16

40.1 L

(10.5 gal)

5/8

44.05 L

(11.6 gal)

11/16

48 L

(12.6 gal)

3/4

51.95 L

(13.7 gal)

13/16

55.9 L

(14.7 gal)

7/8

59.85 L

(15.8 gal)

15/16

63.8 L

(16.8 gal)

(F) FULL

66.56-72.3 L

(17.5-19.1 gal)