Last post on Dec 27, 2012 at 12:40 PM
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Chevrolet Blazer, SUV
#7 of 185 Re: 1998 Chevy Blazer - Manufacturer Controlled Transmission Code P1970 [theugamom]
Jul 29, 2006 (3:50 am)
Believe you meant P1870.
TSB # 01-07-30-023A
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)
When the conditions for setting DTC P1870 are met (first trip), the PCM commands maximum line pressure and harsh 1-2 shifts are the result. This may result in a harsh 1-2 shift with no history code if the conditions for setting the DTC required for the second trip are not met, on two consecutive trips (Ignition cycles, with a drive cycle).
Bottom line driving it may or may not damage it more - I had this occur on my 99 and after shutting it off and restarting it went away and that never returned. At least stop by and have the pan dropped and the filter changed ($60-85) and see if all works OK. This normally only requires a TCC solenoid replacement if any repair - but depends on mileage and use/abuse (towing/offroading etc).
#8 of 185 99 jimmy check engine light $1500.00??
Sep 20, 2006 (6:50 pm)
My husbands jimmy's check engine light has been on for about 5 months. We now know that the fuel pump is bad because one day it wouldn't start and he tapped the bottom of the tank and then it started. He doesn't have to do this every time. We took it to the shop for an inspection knowing that we would have to get that fixed before they would give the sticker. Any way they found 5 or 6 codes and said it would be $1500.00. AIR (air injection regulator) pump, hoses and check valves. Fuel pump, filter and hoses/lines. Also a CERP belt. Could the fuel pump being bad cause all the other codes? Is it really needing all these parts. I didn't write down the codes the shop gave but i can get them if you need them. Also should we fix this our selves? Also how hard of a job is it?
#9 of 185 Not sure if I can help
Sep 23, 2006 (5:01 pm)
I an not an expert but I just had my Jimmy put on the computer the other day too because my check engine light was on and we were having major problems with it. I was given two codes, one for the O2 sensor and one for the 3-2 shift selinoid in the transmission. After replacing both I was told that the computer was wrong and that the entire transmission is bad and has to be replaced immediately. Two different mechanics told me that the computer doesn't always give the exact answer, it gives a round about answer of what it could be and then the garage/shop tries to narrow it down from there (not sure if that's true or not but that's what the mechanic told me at the time). I would suggest having it put on another computer just in case, there is no point putting out all of that money if it's not the cause (like I just did).
#10 of 185 Re: 99 jimmy check engine light $1500.00?? [austininny]
Sep 24, 2006 (2:34 am)
Sorry for the slow response I was campimg and yes it did rain of course!
1. As for the air pump - yes those often fail and their is a pump under the radiator that pumps air into exhuast for 1 min or so on startup and the hose stucks water, the 2 metal check valves fail open and burn the hoses off too, and then their are 2 solenoids and 2 pplastic diaphrams that can get burned.
2. Fuel pump pressure has to be tested and its 60psi min at start (key on engine off) and 53psi min running. Need a pressure tester on the test rail about $35 from Actron. In the tank and a pain to drop if not setup to do it. Use only a Delco pump as most aftermarkets have had problems and only have a 1 year warranty. Part is $400-500.
3. Yes, possible that low or fluating fuel pressure cabn cause other codes but need the codes - a P0300 random misfire is one but that has about 6 other possible reasons too.
4. Serpentine belt is the big "fan" belt that is $25-30 part and then thereare 2 pulleys tha may squeal called the idler (fixed on top) and the flex one called tensioner.
#11 of 185 Re: Not sure if I can help [wbgal]
Oct 08, 2006 (7:43 pm)
thanks a bunch for your comment. We ended up just forking out the money so every things under warranty. We probably could of fixed it for less than half their price but O WELL.
Lifes a B.
#12 of 185 Re: check engine light [christopher71]
Oct 25, 2006 (5:09 pm)
i agree it should be a recalled item. this is ridiculous. i am and have been going thru this for a year . now after hurricane. so im sure water had something to do with it. now we had a flood; so htis p0410 is it something i can fix. i am changing the fuel pump and regulator. will this do it. well dad is doing it.!! ha ha
#13 of 185 Re: check engine light [christopher71]
Oct 25, 2006 (5:15 pm)
by the way you say . and that part will cost me $500 and is on national backorder . but you did not say the part.. if you know the part.. please tell me.. please i am so so upset with my life and blazer
#14 of 185 Re: check engine light [uptown]
Oct 26, 2006 (1:44 pm)
Well thats their story cause they ran out of pumps - lots of good auto stores can order Delco with the #s I've attached:
DTC P0410 Sec Air Injection - How to Repair and Part#s
99-01 Blazers with the 4.3L motor and 00-03 2.2L motors have the Secondary Air Injection system and I've listed the codes, part #s, circuit description, and have to fix below.
DTC P0410 (SES Light On) - Secondary Air Injection
P1415 and/or P1416 for secondary air injection Bank A and B can also be set if the powertrain control module (PCM) detects a heated oxygen sensor voltage mismatch and activates an internal test to confirm.
This is located under the radiator (pump, electric solenoid, and vacuum shutoff valve) and tees off up to the exhaust manifolds thru 2 check valves on 4.3L. For 4wd remove the front skid plate to access. The secondary air injection pump is used to lower tail pipe emissions on start-up. The PCM supplies a ground to the pump relay, which energizes the pump and the electric solenoid valve. Engine vacuum is applied to the shut-off valve when the solenoid is energized. The engine vacuum opens the shut-off valve that allows air to flow to the exhaust manifolds. Often the pump gets water/moisture in it and freezes up blowing the fuse and the check valves rust or freeze open internally and then burn thru the rubber hose, and even melt the lower “T”, shutoff, and even pump impeller.
Check/Replace as required:
1. You should hear the pump on starting the Blazer and if you put your hand on it you will feel it running for about 1 minute. Part #12560095 (AC Delco 215-364) Pump, Sec Air Inj for 1999-2000 L35 (4.3L) or #12568324 (AC Delco 215-425) Pump, Sec Air Inj for 2001 L35 (4.3L) + 2000-2003 L43/LN2 (2.2L).
The GM # is on your current pump so check it because the Dealer is very confused and/or out of these and will sub other pumps. You can remove the pump and take the #25 torx screws out and see if the impeller is clogged, rusted, melted, etc before spending $100-200 for it. Impeller should spin freely.
2. Extend the air intake hose that ends halfway up the passenger side of the radiator about 2 more feet so it can run between the battery and coolant reservoir and push into the fender hole to keep dry. 99-00 is 5/8 heater hose and inline connector and 01-03 is 3/4 heater hose and inline connector –check size.
3. #12558992 (AC Delco 215-638) air injection check valves 2 required – most stores sell these for $12-20 each or Dealer $33 each. If they rattle or the hoses are burned thru replace – should only flow air into the exhaust. The easiest way is to remove the two 13mm nuts that mount the check valve pipe to the exhaust manifold and use a vise to hold them – trust me here. The little exhaust gaskets should be reusable.
4. #10217106 connect (hoses) 2 required check valves to pipes (Dealer Only $7 each). If burned thru or hard/brittle replace. Usually a good thing to plan on buying!
5. #12555165 secondary injection shutoff valve (vacuum operated in the ¾” hose in the pump outlet to the “T” pipe under the Blazer (Dealer Only $27). Only open when the pump is on and vac applied. Also replace the 5/32” vac hose from the solenoid to valve and solenoid to intake (about 4 ft of it). Once you extend the air intake listen to the hose end and you should not hear any exhaust noise after the short initial one minute pump run – if you still do the vac diaphragm is stuck open/clogged/burned so replace. Vac is applied by an electric solenoid mounted by the pump #01997264. The center vac port goes to the intake manifold vac and the off center vac goes to the shutoff valve above. The vac should only be applied to the shutoff valve for that 1 minute as the Blazer starts then is switched off. Hose clamps will be needed here.
6. #10105352 “T” for under Blazer where pump outlet to both pipes connect – if yours melted! One end is ¾” and two are 5/8”ends - but you can use a ¾” on all ends with a little lube. Hose clamps here too.
7. The pumps 30 amps Maxi-fuse (large size) is under a little black cover between your battery tray and inside the passenger side fender. You may have to remove your battery to get to it. Depress the little cover retainer and remove, then pull the large fuse out to check/replace. There’s also a 10 amp small fuse to check for the electric solenoid that controls the secondary injection shutoff valve mounted by the air pump.
8. If you need the 2 lower hoses that connect the metal pipes to the “T” going to the pump here’s the bad news – Dealer Only and includes the pipes so over $100.
That’s all there is to it – Enjoy.
Dec 24, 2006 (9:12 am)
with my 2005 gmc jimmy i have a hard time putting fuel into it. The fuel light on all the time but when i try to refuel it is acting like it is full and wont let me put any fuel in
Dec 25, 2006 (7:26 am)
hello and merry xmas. My question is why can i not put gasoline into my 2005 gmc jimmy? The gas light is on and when i try to put fuel in it acts like it is full. Any ideas? my email is mingmyesympatico.ca