Dtc codesb306 - Delphi Car Audio & Video

4 engines non told, (it tells tranny that is there)
I assume shift links not bad PRNDL, but if P works and D so must R
a/t box 4T45e I guess. or 6T40 or 6t is six speeds.

1. check fuses.
2. scan the PCm for P0700 errors for tranny
3. check line pressure per service manual I have it. can tell it but takes 400 psi gauge, but here is spec for Reverse.
4. vac port at 0hg vac, 255 psi min.
5. vac port to 19inches HG, port main 74min.
6. these modern trannys have pressure regulator. that can be bad but gee the scans tell you that if true, not scanning is why you miss all that and tons more. From ATSG manual, 4T45e

here is DTC list, and more ,scan first, or go broke guessing.

DTC P0218
DTC P0562 or P0563
2.4L L4 VIN B Automatic
3.5L V6 VIN K Automatic
3.9L V6 VIN 1 Automatic
3.6L V6 VIN 7 Automatic
3.5L V6 VIN N Automatic
DTC P0601-P0604 or P062F
DTC P0705
DTC P0711-P0713
DTC P0716 or P0717
DTC P0722 or P0723
DTC P0741 or P0742
DTC P0751 or P0752
DTC P0756 or P0757
DTC P0815, P0816, or P0826
DTC P0842 or P0843
DTC P0851 or P0852
DTC P0961
DTC P0973 or P0974
DTC P0976 or P0977
DTC P150C
DTC P1750
DTC P1810, P1816, or P1818
DTC P1811
DTC P1876 or P1877
DTC P2534
DTC P2763 or P2764

Of course there are no latches to undo . It's all electrically operated . Has a control module ( computer ) , sensor inputs , hydraulics etc.... More then likely codes are stored in the control module . Need a factory or professional type scan tool to check these code's .

Any one of these codes could cause it not to work
DTC B1010
DTC B1296
DTC B1307
DTC B1325
DTC B1335
DTC B1345
DTC B1395
DTC B316A
DTC B3602
DTC B3669
DTC B366A
DTC B366B
DTC B366C
DTC B366D
DTC B366E
DTC B3674
DTC B3675
DTC B367A
DTC B367B
DTC B367F
DTC B3680
DTC B3683
DTC B3685

Taking the vehicle to a qualified repair shop mite be your best bet . DTC B1296 01: Movable Roof Header Unlatched Sensor Circuit short to battery
DTC B1296 06: Movable Roof Header Unlatched Sensor Circuit short to ground or open
DTC B1296 58: Movable Roof Header Unlatched Sensor Circuit incorrect reaction after event
DTC B1296 59: Movable Roof Header Unlatched Sensor Circuit circuit/component protection time out

Circuit/System Description
S1 is the Folding Top Header Latch Cylinder Sensor. The folding top control (FTC) module uses S1 to determine if the Folding Top Header Latch Cylinder is in the latched or unlatched position. S1 is a hall effect sensor that becomes active when the cylinder is in the unlatched position.
DTC B1307 58: Movable Roof Latch Signal Circuit incorrect reaction after event
DTC B1307 59: Movable Roof Latch Signal Circuit circuit/component protection time out

The first thing to do would be to hook up a scan tool that can communicate with the Roof door module (RDM) an check for code's (DTC'S) . Can set a bunch of different code's
DTC B1296
DTC B1300
DTC B1306
DTC B1310
DTC B1311
DTC B1323
DTC B1517
DTC B1518
DTC B3602
DTC B3665
DTC B3666
DTC B3667
DTC B3670
DTC B3671
DTC B3674
DTC B3675
DTC B3676
DTC B3677
DTC B3681
DTC B3682
DTC BThe roof door module (RDM) checks the outer latch latched signal circuit, at least once every 200 milliseconds.
The folding top outer latch position switch is supplied with a constant ground source.
When the switch is active, the RDM will detect a switched ground signal on the folding top outer latch position switch latched signal circuit indicating that the latch is latched.

DTC B3685
Without a factory or professional scan tool you can't read these code's . Advance , auto zone , pep boy's etc .... can't read these code's . Your best bet take it to the Dealer or someother qualified repair shop.
Sample of code DTC B1296
The roof door module (RDM) checks the outer latch latched signal circuit, at least once every 200 milliseconds.
The folding top outer latch position switch is supplied with a constant ground source.
When the switch is active, the RDM will detect a switched ground signal on the folding top outer latch position switch latched signal circuit indicating that the latch is latched.

replaced what actuator ? The 4X4 switch on the instrument cluster ? Did you ever think of having it check for DTC'S - diagnostic trouble codes ? There are a number of them , they are there for shorting diagnostic time DTC B0770
DTC B0775
DTC B0780
DTC B0785
DTC B0790
DTC B2725
DTC C0300
DTC C0305
DTC C0306
DTC C0321
DTC C0326
DTC C0327
DTC C0359
DTC C0374
DTC C0378
DTC C0379
DTC C0550
DTC C0558

Which of these transfer case's does your truck have ?
Transfer Case - NVG 149-NP3 Transfer Case - NVG 246-NP8 Transfer Case - NVG 261-NP2 Transfer Case - NVG 263-NP1
The NVG 263 transfer case features a three button shift control switch located on the instrument panel.
DTC B0790 DTC B2725 DTC C0306 DTC C0327 DTC C0359 DTC C0379 DTC C0550

The NVG 246 EAU transfer case features a 4 button shift control switch located on the instrument panel.
DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550
Regardless both of these switch's are input's to a control module . There are probably DTC'S - diagnostic trouble codes stored . You should have the vehicle checked for DTC , That means taking you vehicle to the repair shop .

Are there any DTC's - diagnostic trouble codes ?in the PCM / BCM ? You have third an fourth below 50 mph but above 50 it down shifts to 2nd gear ,is this what your saying or you don't have 3rd or 4th gears at all ? Which engine did yours come with ? 2.2 L or 4.3 L You trans can set several DTC'S an not all will turn on the check engine light .
DTC B2722 (4.3 L) DTC P0218 (2.2 L) DTC P0218 (4.3 L) DTC P0502 (2.2 L) DTC P0502 (4.3 L) DTC P0503 (2.2 L) DTC P0503 (4.3 L) DTC P0705 (2.2 L) DTC P0706 (4.3 L) DTC P0711 (2.2 L) DTC P0711 (4.3 L) DTC P0712 (2.2 L) DTC P0712 (4.3 L) DTC P0713 (2.2 L) DTC P0713 (4.3 L) DTC P0719 (2.2 L) DTC P0719 (4.3 L) DTC P0724 (2.2 L) DTC P0724 (4.3 L) DTC P0740 (2.2 L) DTC P0740 (4.3 L) DTC P0741 (4.3 L) DTC P0742 (2.2 L) DTC P0742 (4.3 L) DTC P0748 (2.2 L) DTC P0748 (4.3 L) DTC P0751 (2.2 L) DTC P0751 (4.3 L) DTC P0752 (4.3 L) DTC P0753 (2.2 L) DTC P0753 (4.3 L) DTC P0756 (2.2 L) DTC P0756 (4.3 L) DTC P0757 (4.3 L) DTC P0758 (2.2 L) DTC P0758 (4.3 L) DTC P0785 (2.2 L) DTC P0785 (4.3 L) DTC P1810 (2.2 L) DTC P1810 (4.3 L) DTC P1860 (2.2 L) DTC P1860 (4.3 L) DTC P1870 (2.2 L) DTC P1870 (4.3 L) DTC P1875 (4.3 L) .
Shift Pattern This category contains the following topics:
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One forward gear only

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Two forward gears only

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Gear missing or slipping

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No upshift or slipping upshift

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No downshifts

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Non-First gear start

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Refer to First Gear Range Only - No Upshift .

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Refer to Third Gear Only .

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Refer to Second/Third Gear Only or First/Fourth Gears Only .

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Refer to Slips in First Gear .

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Refer to Slipping or Harsh 1-2 Shift .

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Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .

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Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .

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Refer to No Part Throttle or Delayed Downshifts .

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Refer to Second Gear Start .

Diagnostic Starting Point - Roof (Folding Top)
Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Vehicle System Check will provide the following information:
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The identification of the control modules which commands the system

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The ability of the control modules to communicate through the serial data circuit

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The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of Vehicle System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Have vehicle scanned for DTC'S . The power roof has a number of DTC'S that can be set ,could make diagnosing easier !
DTC B1010 DTC B1296 DTC B1307 DTC B1325 DTC B1335 DTC B1345 DTC B1395 DTC B316A DTC B3602 DTC B3669 DTC B366A DTC B366B DTC B366C DTC B366D DTC B366E DTC B3674 DTC B3675 DTC B367A DTC B367B DTC B367F DTC B3680 DTC B3683 DTC B3685
There are a number of sensors for your convertible top !
DTC B1010 08: System Sensors Data Mismatch signal invalid
DTC B1010 08 sets when the folding top control (FTC) module detects a switch is not in the proper state when compared to other switches. The conditions that cause DTC B1010 08 to set may also set other Folding Top DTCs. The position and direction of the folding top when the fault occurs will determine whether DTC B1010 08 will set or another Folding Top DTC will set. If any Folding Top DTCs between DTC B1296-DTC B3685 are set, diagnose those DTCs first. After diagnosing any other Folding Top DTCs, clear DTCs and operate the Folding Top to see if DTC B1010 08 resets before diagnosing it.
DTC B1296 01: Movable Roof Header Unlatched Sensor Circuit short to battery

DTC B1296 06: Movable Roof Header Unlatched Sensor Circuit short to ground or open

DTC B1296 58: Movable Roof Header Unlatched Sensor Circuit incorrect reaction after event

DTC B1296 59: Movable Roof Header Unlatched Sensor Circuit circuit/component protection time out
You best bet is to take your vehicle to a ASE certified repair shop or to a GM dealer .
The f

Have the codes checked ! Do you know what codes are ,What the light is for ? The light is to warn the driver that there is a problem in the ABS system . Have the codes checked before replacing parts ,the code will point you in the direction to go .This system can set numerous DTC'S
DTC C1211 DTC C1214 DTC C1217 DTC C1218 DTC C1221-C1235 DTC C1236 DTC C1237 DTC C1238 DTC C1242 or C1243 DTC C1248 DTC C1251 (w/F45) DTC C1254 DTC C1255 or C1256 DTC C1261-C1274 DTC C1276, P1644, or P1689 DTC C1277 or P1571 DTC C1278 DTC C1281, C1283, or C1286 DTC C1282 DTC C1284 or C1285 DTC C1287 or C1288 DTC C1291 or C1293 DTC C1294 DTC C1295 Maybe your best bet would be to take your vehicle to a ASE certified repair shop or the dealer

ABS on ? DTC'S - diagnostic trouble code's are probably stored in the ABS control module . 4X4 an ABS are not related . To fix , take it to a qualified repair shop.
SERVICE 4WD: Refer to Transfer Case Circuit Description in

Transfer Case Shift Control Module
The transfer case shift control module uses the VIN information for calculations that are required for the different calibrations used based on axle ratio, transmission, tire size, and engine. The system does not know which calibration to use without this information. The transfer case shift control module monitors the speed of the front and rear propshafts in order to detect wheel slippage. When wheel slippage is detected, the module applies a clutch pack contained in side the transfer case. This clutch pack is used to lock-in and apply the front propshaft, transferring torque to the front wheels. The clutch pack is applied by a motor/encoder assembly. When slip is no longer detected by the transfer case shift control module, the clutch is no longer applied.

These are all code's for 4X4 Do you know what a DTC is ? diagnostic trouble code
DTC B0770
DTC B0775
DTC B0780
DTC B0785
DTC B0790
DTC B2725
DTC C0300
DTC C0305
DTC C0306
DTC C0321
DTC C0327
DTC C0359
DTC C0374
DTC C0379
DTC C0550

ABS DTC'S
DTC C0221-C0227 or C021
DTC C0229 or C029
DTC C0235-C0237, C035-C037, or P1504
DTC C0238 or C038
DTC C0241-C0254 or C041-C054
DTC C0265 or C0266 and C065 or C066
DTC C0267 or C0268 and C067 or C068
DTC C0269 or C0274 and C069 or C074
DTC C0271-C0273, C0284
DTC C0279
DTC C0281 or C081
DTC C0283 (w/NW7)
DTC C0287, P1644, or P1689
DTC C0290 or C0292
DTC C0291
DTC C0297
DTC C0298 or P1571

Manual or automatic climate control ? Duel zone ? Could be caused by a stuck or sticking temp. blend door actuator . Hooking up a scanner an checking for DTC'S - diagnostic trtouble code's should be the first thing to do , not guessing an just replacing parts . Automatic system can set a bunch of DTC'S
DTC B0126
DTC B0131
DTC B0159
DTC B0164
DTC B0174
DTC B0179
DTC B0184 or B0189
DTC B0234
DTC B0237
DTC B0249
DTC B0252
DTC B0269
DTC B0272
DTC B0279
DTC B0282
DTC B0490
DTC B1000
DTC B2805
DTC P0530
DTC P1536
DTC P1540
DTC P1546
Your best bet mite be to take your vehicle to a qualified repair shop .