<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:827fde42-68ba-431a-871b-f3fe235859e8,g:707956f0-45ef-4fe9-afbe-e15fb0b89bf3-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.paalp.com/role/CoverPage" xlink:type="simple" xlink:href="pagp-20220803.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.paalp.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_3b9a3b97-cb81-4256-81cd-c84c1759f76e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_DocumentType_3b9a3b97-cb81-4256-81cd-c84c1759f76e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_96636940-772e-4cf8-bc1e-18067ed4164e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_DocumentPeriodEndDate_96636940-772e-4cf8-bc1e-18067ed4164e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_4fada38b-d650-4043-888d-288dcdb64376" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityRegistrantName_4fada38b-d650-4043-888d-288dcdb64376" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_0c24e4b8-73b0-453d-9398-5e9eed6fd3c6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityIncorporationStateCountryCode_0c24e4b8-73b0-453d-9398-5e9eed6fd3c6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_b97dc6d9-1329-4cc3-951f-8f23a6a941eb" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityFileNumber_b97dc6d9-1329-4cc3-951f-8f23a6a941eb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_e97b1cc2-11f1-4815-9a83-b2bc499091fb" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityTaxIdentificationNumber_e97b1cc2-11f1-4815-9a83-b2bc499091fb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_fc74832f-8604-4168-bc90-3af4bc10d7f6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityAddressAddressLine1_fc74832f-8604-4168-bc90-3af4bc10d7f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_58a94d94-d511-43e8-8c40-10d4e7ca76b8" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine2"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityAddressAddressLine2_58a94d94-d511-43e8-8c40-10d4e7ca76b8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_b31b1780-8ad0-4e02-b3f6-e95784681629" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityAddressCityOrTown_b31b1780-8ad0-4e02-b3f6-e95784681629" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_28246d65-6b42-4ac0-9651-cb56bb8743d3" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityAddressStateOrProvince_28246d65-6b42-4ac0-9651-cb56bb8743d3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_eb27fff1-77dd-477a-8177-7070c3a1be15" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityAddressPostalZipCode_eb27fff1-77dd-477a-8177-7070c3a1be15" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_e8c1288b-28cc-4ed1-88a8-619155d6d0e9" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_CityAreaCode_e8c1288b-28cc-4ed1-88a8-619155d6d0e9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_00350f25-ce5d-4e1c-875e-925a84337e06" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_LocalPhoneNumber_00350f25-ce5d-4e1c-875e-925a84337e06" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_944e016c-72a9-48f2-b8cc-7c39e7cb8932" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_WrittenCommunications_944e016c-72a9-48f2-b8cc-7c39e7cb8932" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_e83327f7-9956-4f3e-8d86-82e8711a5486" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_SolicitingMaterial_e83327f7-9956-4f3e-8d86-82e8711a5486" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_01cf0f10-a94a-41d7-bcf3-1befcd8ecff6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_PreCommencementTenderOffer_01cf0f10-a94a-41d7-bcf3-1befcd8ecff6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_d051400c-641c-42b3-b5bc-8f3362d96b52" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_d051400c-641c-42b3-b5bc-8f3362d96b52" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_8368b99d-694a-4f52-a8fc-7057aec3eed5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityEmergingGrowthCompany_8368b99d-694a-4f52-a8fc-7057aec3eed5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_539bcadd-2677-4105-b1b2-8d5a144eece6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_Security12bTitle_539bcadd-2677-4105-b1b2-8d5a144eece6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_d4184503-8ab8-430d-89fa-cda9fe3fa302" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_TradingSymbol_d4184503-8ab8-430d-89fa-cda9fe3fa302" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_04b4a13d-ee0d-473e-b0af-5c886c0dd630" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_SecurityExchangeName_04b4a13d-ee0d-473e-b0af-5c886c0dd630" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_42a1c1b9-c386-4c96-b97c-17e835208c08" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_EntityCentralIndexKey_42a1c1b9-c386-4c96-b97c-17e835208c08" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_7aa22400-ebaa-407e-8e66-6502dd6ad3b6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_8f93d251-7915-4198-b5df-54698321cc31" xlink:to="loc_dei_AmendmentFlag_7aa22400-ebaa-407e-8e66-6502dd6ad3b6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
