Why is my GMC Sierra 1500 not shifting?

If in fact the tranny you put in is good, then the possibilities are that you have a wiring problem from your TCM to the tranny or your TCM is messed up. A good tranny shop can run stand alone testing to find out what you actually have going on. 41 people found this helpful.

What kind of engine is a 2000 GMC Sierra?

2000 GMC 1500 2wd truck. Engine Size : 4.3 lt Question: transmission will not shift into drive and overdrive checked fluid OK i think a shift solenoid tranny is a 4L60-E tell me what else to check there is a check engine lite on do not code for transmission valve or shift solenoid answer my question please.

Is it possible to have a shifting problem?

Then yes that can cause a shifting problem, but you should have a check engine light for it if it isn’t making proper contact internally, this tells the computer what gear you have selected. 23 people found this helpful. Is this the TCM?

Where is the ECM on a GMC Sierra 1500?

32 people found this helpful. It’s usually right next to the ECM, it will have a 60 pin connector to it, and is about 4X5 . 22 people found this helpful. Alright sweet thanks “tennisshoes”

Can a GMC Sierra shift into any gear?

Answer: There is no solenoid that will prevent the transmission from going into any forward gear. Shift solenoids control shift 1-2, 2-3, 3-4 and downshifts. You need to get a scan done on the computer to see what code (s) is set.

Why is the transmission not shifting on my Chevy Silverado?

Take a couple of easy steps to see why your truck is not shifting. No need to panic yet. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Your transmission is just supposed to shift and leave you alone.

Can a Chevy Silverado go from 1st to 4th shift?

Transmission is in Limp Home Mode or has no electrical power. Also, PCM has lots of error codes. No 1st or 4th, shift 2nd to 3rd by itself when put in D or OD and locks converter: Goes into gear but sluggish like brakes are on, can manually shift to 2nd to get moving, then put in OD and truck shift 3rd as well as 4th are OK.

Service 4-Wheel Drive light came on, would not shift out of 4WD. Scan found code B272508 (Mode Switch signal). Transfer case switch on dash had internal fault and was replaced. Software update for PCM/TCM and a lubrication of the slip-yolk. This was to fix rough transmission shifting when slowing to a stop.

Can a 3rd and 4th gears work on a GMC Sierra?

3rd & 4th gears would work sometimes, other times not. You checked all the wiring, pins and plugs and all look good. You put in a used vacuum control module and that didn’t change anything.

How to test shift solenoids on GM 4.3L?

In this article, I’ll show you how to test the transmission shift solenoids (specifically 1-2 solenoid and 2-3 solenoid) on your GM 4.3L, 5.0L, 5.7L pick up, van, SUV. You’ll be surprised just how easy it is to diagnose these shift solenoids when they have failed.

What to do if your GMC Sierra has transmission problems?

The transmission fluid was drained and flushed, the filter changed, and a new transmission fluid added. Was told to drive for 300 miles and if problem returns, I would need a new torque converter. The truck is fine so far (but I have only had it back from the dealer 2 days).

Why is my Silverado not shifting into higher gears?

Not shifting into higher gears – 2009 Chevrolet Silverado… I put the vehicle in drive it will go and make it s first gear shift, however as I progressively get going faster the engine will rev up, the oil gauge spikes up and it doesn’t shift, I let off the accelerator and it will shift.

3rd & 4th gears would work sometimes, other times not. You checked all the wiring, pins and plugs and all look good. You put in a used vacuum control module and that didn’t change anything.

Why does my car not shift into third gear?

Such a problem is automatic transmission won’t shift into 3rd gear. The transmission shifts into the first and then to second gear but does not move into the third gear. It seems that the gear slips into neutral when you push it to the third. Another instance could be the automatic transmission won’t shift into 3rd gear at all.

How to check your GMC Sierra 1500 transmission?

Clean the air flow sensor also, check the minimum air rate, reset if needed, then reset the ECM and roadtest if the check engine returns with the same code, check the ECM’s sensor voltage to that sensor, if the ECM’s voltage is at 5 volts or just slightly below at the sensor then check the sensor ground if it checks good then replace the sensor.

How much horsepower does a GMC Sierra 1500 have?

420-horsepower 6.2L V8 8-speed shiftable automatic 4WD w/low range Automatic 8 speed trans hard shifting from 1st to 2nd and 3rd to 2nd gears under light throttle. Reprogram of trans control and other modules.

Is the reverse on a GMC Sierra 2WD?

I have a 2007 gmc Sierra 2wd reverse wont work and it shifts hard into 2nd gear but shifts out fine my dad drove this truck for 7 months and transmission never quit and still drives the same the people he bought it from had a just put that transmission in it and when the reverse wouldnt work they decided to sell it any ideas ??

Why does my Sierra 2500 shift so hard?

I have a 2000 Sierra 2500. Recently it’s started to shift extremely hard under certain circumstances. It never does it when it’s cold (the trans, not ambient), and it sometimes does it when it’s warm. Anyone have an idea of what the problem might be? Do you ever change the tranny fluid and filter?

How long does it take a GMC Sierra 1500 to shift gears?

Doing work on my 2001 GMC Sierra 1500. If i floor it, it takes forever to shift gears. Rpm jumps up to 6 and sticks for about a minute unless i come off the accelerator. I know my throttle body could use a good cleaning but i also get a small evap leak code.

Is it normal for GM trucks to have hard shifting?

Although don’t be mad if that doesn’t help because if it’s a 4L60E they don’t last forever in thier stock form. Don’t be surprised at metal on the magnet if you do it yourself that is normal. FYI I don’t think GM recomends flushes, and find out if your truck has dexron 3 or 6 because if its 6 you have to use 6 in it.

Are there transmission problems with a 2003 GMC Sierra?

After five years, most of the issues with these trucks had been worked out. Now, these trucks are getting older, and it’s very likely that your 2003 Sierra may be having transmission problems. Below, you’ll find a ton of troubleshooting your transmission problems.

Why is my GMC Sierra only getting 3rd gear?

Another thing is, if you keep it in drive you’re only getting 3rd gear, but if you manually shift it into 2nd gear, it’ll go there. That makes taking off much better on the transmission. In either first or second gear, the torque converter slips more than it normally would on a takeoff.

What kind of transmission does a GMC Sierra 1500 have?

355-horsepower 5.3L V8 8-speed shiftable automatic 4WD w/low range Transmission was shuddering at highway speeds under light throttle application. The dealer seemed to know of this problem. The transmission fluid was drained and flushed, the filter changed, and a new transmission fluid added.

Why does my GMC Sierra 1500 not shift gears?

GMC Sierra 1500 Questions – Speedometer doesn’t work and transmission doesn’t shift gears. – CarGurus Speedometer doesn’t work and transmission doesn’t shift gears. The speedometer stays at 0 all the time. When the transmission is in drive it won’t come out of 1st gear.

What to do when automatic transmission won’t shift into 3rd gear?

Check the Throttle Cables. Changing the fluid solves plenty of transmission issues but if the problem of automatic transmission won’t shift into 3rd gear persists, the parts you should check are the throttle cables. A defective cable with excessive slack is likely to create issues with smooth shifting of the gears.

When does Chevy Silverado shift into 2nd gear?

-In Drive, 1st engaged, no sleeping, at full throttle engine hit the rev limit and transmission won’t shift, shifts only when let off the gas. Same thing in 4HI or 4LO. – When I hit the throttle hard until 4000 rpm and let off it shifts at about 2500 rpm.

Why does my speedometer not work on my GMC Sierra 1500?

– CarGurus Speedometer doesn’t work and transmission doesn’t shift gears. The speedometer stays at 0 all the time. When the transmission is in drive it won’t come out of 1st gear. Reverse works fine, and if I manually put the transmission in 1st or 2nd it works fine.

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